Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba1a0116fd89c34…

MALICIOUS

PDF

75.3 KB Created: 2021-07-02 09:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 46826c76764d006b104f39b1be5a0b4d SHA-1: 67136ac322459230b2bf2aaed9f7625140a163d9 SHA-256: eba1a0116fd89c34f3763b24b9580786a10f3305a5b5ad7b18f6d921b00b6a91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious content or phishing sites. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/59747f8f148d30edef1ff8567980ff01/31782963430.pdf In PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac60c3874e---rexiso.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/33c4f5463da538dfa56306b034d0ecdc/pedotozerexizozerilijine.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/joleketaneposilofiva.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fb521d9d4---91733409625.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/jt9pdd8ff90rijrbsojq3gfaod/nukolowabavi.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/e0001c0efbf2fe6ffdcec8af559e2a25/51628569440.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1a4f5ec8509cc4ed6108b315917cb9f2/sudikugiw.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/novijawovomebigopavudeza.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/18390234944.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841cca1d15b---zibururure.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/13485840759.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c686601c725---vunenimosod.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24e368d06---28115789365.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/95940534180.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/68743211978.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/50490995152.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/rodul.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/37891015196.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/4vlk921avu9enfqtcvkntagauu/95720905770.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814d04be99d---gimutefejenato.pdfIn PDF document text
    • https://fuoriscena.eu/file/tozevubefuwupu.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/lawilivimidepezege.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/89694502254.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/iqsicrpcbt523fq97sb3b8edt2/fupumibosixosage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+put+word+to+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F6 16580 bytes
SHA-256: 8e8df6648a552c469d70936557130d5dfb8e2fcd915e574ffc3d5f7d32b48dd1
font_01_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 9964 bytes
SHA-256: f43db46a81dca9ae3cd24c0a1d32a4817f0f94650c09cbf3a90dec178ead9475