Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7615c8e0176f462…

MALICIOUS

PDF

110.4 KB Created: 2021-06-29 19:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 272991bb6c98769a7670ee1ecb5de22b SHA-1: 1d1b45e26b8e46bcec8497f86f125e9669227743 SHA-256: b7615c8e0176f46227a3cfe7c5c2fb39935e11284ff2724e2da43c08f6c15b5d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The presence of external URIs and link farm characteristics suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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://laborke.ru/uplcv?utm_term=christ+anointed+church PDF link annotation
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/al138hc8lbmqsbtvrb6jhmmc27/pegajameb.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56e76e23e---tegirovokogagonezonef.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/0c0453ba70af39ad9d1a37a2b5643d7b/22670044556.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d431ae27---mafizukivorog.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/hvsn434c6l813k1ds2t66h0h0g/lagolejoxigijagega.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160858bd742a22---dosisufovi.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/83711488720.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/26891757319.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d390958ce0---99463464905.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e4d01dd3a445a89051d863ac0db8cca8/6981143123.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a301aae2652---17044122717.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f9dc3aa89---fokexukego.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e8a9062eb---23966412148.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/hal881f7t2vt981ju2vthcm6m0/12891542095.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/8626325814.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/gutisulil.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/729274e64327c056cfc8f7ada52811d5/81701567053.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/00d97e546e6c130091dd83d20fa0f0f4/65197357284.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/71908517561.pdfIn PDF document text
    • http://cloverdiamond.com/file/nolakesuz.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/94b6412020fe1fbb08e292f41fbafad8/vewikajo.pdfIn PDF document text
    • https://cape-electronics.com/media/file/80696177656.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/lutizadabazu.pdfIn PDF document text
    • 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_off00012e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7F 10552 bytes
SHA-256: ffb3b6d8cc54297df9479f1cfeb1a6f8a1b45258d730a8e8db01d21ff80384b1
font_01_sfnt_off00014683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14683 16632 bytes
SHA-256: ff68716322524b672498e7e1aa97fe0a5ec11b2b637ef013097ef36ee39f4243
font_02_sfnt_off00015dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00017610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17610 21208 bytes
SHA-256: 8b0ab745fecbce6ab2fd68f8e18d74ef8a87f24d6d6c02b6fd3240769a8c2f2e

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