Malicious PDF — malware analysis report

Static analysis result for SHA-256 6056baa73073a37f…

MALICIOUS

PDF

91.0 KB Created: 2021-02-20 20:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 111429f4bd5c6e156632bbf9e87dcba8 SHA-1: cf68325de2fb5e4d319adcaa1474afc53a78396b SHA-256: 6056baa73073a37f5f372e9f15c86230394a8759f2d343b448f0b72cec4fda1d
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including ClamAV's Pdf.Phishing.Trojan detection. It functions as a link farm, containing numerous external URIs pointing to various domains, many of which are disposable or associated with link farming activities. The document body is heavily obfuscated, but the presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an intent to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://jottigo.ru/wix?keyword=what+does+foot-washing+baptist PDF link annotation
    • https://cdn.sqhk.co/vogoxaginoje/ghggfgd/pogotelojiwevig.pdfIn PDF document text
    • http://mandarin-fruit.space/aurora_hdr_2018_crackgvdc5.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/jbjfll4/dr_driving_mod_apk_2018.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/8857697.pdfIn PDF document text
    • http://islemleriniz.org/sedugavogumulewaxadorwrly.pdfIn PDF document text
    • https://jivekale.weebly.com/uploads/1/3/4/3/134319103/299d1276.pdfIn PDF document text
    • https://cdn.sqhk.co/tedogegez/eDbUEgh/bridge_constructor_playground_apk_2._0.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/2113947.pdfIn PDF document text
    • http://jakartapro.xyz/resiwonxjdcb.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/uoqjbzs/notigifonug.pdfIn PDF document text
    • https://wobelafesuta.weebly.com/uploads/1/3/4/7/134767333/a3c645.pdfIn PDF document text
    • http://ogranicbio.fun/walmart_black_friday_2019_65_tv4byux.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/idhhWjc/gumball_and_darwin_free_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulujono/7019012847.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/22063260957.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001294a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294A 5452 bytes
SHA-256: ccf67866c2b0687c53ead28560e4efa3d3b67f9f0db4f96694fb76a93a7b31c6
font_01_sfnt_off00013bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFC 10192 bytes
SHA-256: 13001082c2c0b4a2e3516de56ad3ff4a5c928231347c5335611ada74fe35b0c2

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