Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e8867e7cfa1aef…

MALICIOUS

PDF

108.0 KB Created: 2021-07-02 23:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8540aa4e18da20d12a73ee01b5840de8 SHA-1: aa951cdf308c89113f7f49daf8cc40b5c2395c5e SHA-256: 07e8867e7cfa1aef93a67cc808729d194e6721b5abd0baa24bd9e4b64e7521c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malware or phishing content. No scripts were extracted, but the structure suggests an attempt to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a767a9825---57371440082.pdf In PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/84292866862.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/22513443064.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e95c73b94d---36971280636.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833d40fe05.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b954585c1---nutelanunefuzoxazepe.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4166ab173ac298916a38900f26a251e7/51798565669.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/ximazoped.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/wuwiruwinefibejog.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607482a25b368---vaxodubawetiwo.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2049cd691---lajofewewidibonalig.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/ahpmarpunc1t84o05m0iq2u8ie/3490412254.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c5ed4303---rujamajudakuxojiwa.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/77347095295.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/35a9ecbb21933bc30405d2b247743bcb/pixovuwuw.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609069e1d1c8a---nokow.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/54663362173.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/2d23b8b24e207919ee3b221a4763f67e/polawapofuxugupupebi.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/25370608233.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609958b28cfc1---28543129772.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/7521744575.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62092b716b---saganatepizadivalujodul.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e52a547dc---86315427062.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/f87eda48608bb6648f1a3e7a57854d84/5362892529.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/cd92acf790366c2fa3f143a2a784d25f/mewugujizivimulasiwu.pdfIn PDF document text
    • http://capital96.com/userfiles/file/muzazepumakisemudinu.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/21452079276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=well+design+drilling+and+production+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001422d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422D 17048 bytes
SHA-256: 4970a1131e726073fc6dd1ce7c6d92b29d71c0558da2ee8a32ef7e62f31917bd
font_02_sfnt_off00015b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B22 10888 bytes
SHA-256: 97e15fbe7dadcd6bdd9bb461ba7873ea341b1f1fefd961014d69404a61994245
font_03_sfnt_off0001743a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1743A 17296 bytes
SHA-256: b2b41ac052b819f0133c7e9631d670b6018f4e325af820dd57a21538f6ba4165

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