Malicious PDF — malware analysis report

Static analysis result for SHA-256 37170999acf66552…

MALICIOUS

PDF

86.9 KB Created: 2021-08-08 02:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 26051c86437d758d66cf3297a79f9889 SHA-1: f34c25d04c56cd5895ca4bedff9cfff4ba277487 SHA-256: 37170999acf665523eeab09a59b7a02bf34cf3029aa83cec0e855487b8ea6445
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. The document contains a link farm and embedded URLs, suggesting it is designed to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick the user into calling a phone number, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soflocops.com/clients/67403/File/kififiranomadovumigodavi.pdf In PDF document text
    • http://hagelkonzept.de/userfiles/file/rajifunanosi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9d221b6b55486af70fa4f7290be8b59c/mexadudumaxijadaxov.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/88725959191.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2887f583e2a2a6bbae6cbd3c105baa14/jogerupam.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/rurobekomazanabinolo.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/1807015896.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160874c0303e31---33143784108.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/91833065455.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2db40c3a2---67243295512.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/sexomiruvojozor.pdfIn PDF document text
    • http://indecomavo.pl/inc/xukofavenezuduvivivepeb.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fe104bc42---75283481044.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/68420313531.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xatiwixekite.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210718_1D71F6C0BC0AA119.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/tubomu.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/26103906275.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/93426b0a8dde2fbe51728be5fb62b8d2/fosuwujaru.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608052c8dae48---40933995576.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/lupizepamalejotopib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bread+bakery+business+plan+pdf+in+south+africaPDF 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_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 11216 bytes
SHA-256: b90f3a7e1767e36b41379d84e6057720373a8e0481eca8c251ff6439893561d3
font_01_sfnt_off00010628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10628 17560 bytes
SHA-256: 4c4656230ddbd4dbf5936e702580847f293044ba40708d685ce5d9ed4da2a74d
font_02_sfnt_off0001343f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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