Malicious PDF — malware analysis report

Static analysis result for SHA-256 52927c91c2ac79f2…

MALICIOUS

PDF

36.3 KB Created: 2020-06-06 16:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 4ad5753f504cee88f4376a404dc255e6 SHA-1: b0a762601b40680230a05b837c71de2d9d4f2514 SHA-256: 52927c91c2ac79f2009c21eebb66bc428dc5efc640989653dc40f78cbf718124
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document contains a fabricated financial statement lure, designed to prompt the user to call a phone number for support or to resolve a fraudulent issue. This is consistent with callback phishing or tech support scam tactics. The document also contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://chatthillscommunity.com/uploads/1/3/0/2/130289252/130289252.html#aditya+birla+mf+statement PDF link annotation
    • http://mail.nashvillebluetones.com/uploads/1/3/0/6/130621533/808902.pdfIn PDF document text
    • http://ellewells.com/uploads/1/3/1/4/131437157/xuxomusulutojojulos.pdfIn PDF document text
    • http://patriothomeconstruction.trustabiz.com/uploads/1/3/0/2/130272330/mevozin-fosegewasulogu-kodeziwaj.pdfIn PDF document text
    • http://chatthillscommunity.com/uploads/1/3/0/2/130289252/terms.htmlIn PDF document text
    • http://chatthillscommunity.com/uploads/1/3/0/2/130289252/dmca.htmlIn PDF document text
    • http://chatthillscommunity.com/uploads/1/3/0/2/130289252/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://liruxevilo.files.wordpress.com/2020/06/josupo.pdfIn PDF document text
    • https://laxerinu.files.wordpress.com/2020/06/nekuderudaza.pdfIn PDF document text
    • https://vuburizurabo491193510.files.wordpress.com/2020/06/vibowazozowunubo.pdfIn PDF document text
    • https://japilif.files.wordpress.com/2020/06/gefizewe.pdfIn PDF document text
    • https://sebonan.files.wordpress.com/2020/06/92987940560.pdfIn PDF document text
    • https://foxunisi.files.wordpress.com/2020/06/sipaxapinodifivolamun.pdfIn PDF document text
    • https://tefaluvutas.files.wordpress.com/2020/06/dagofov.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 10308 bytes
SHA-256: eaabdb767335ce1f6bd726f212859d9c21fcd7de09bdbedfaccb9f39b8d6302f

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