Malicious PDF — malware analysis report

Static analysis result for SHA-256 29414acf3713e952…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 17:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc7056049ec05abc7b408d4b526beea8 SHA-1: dc4c2e4e3bb627b19ac189ac8e8d83f50d143c9c SHA-256: 29414acf3713e9525f6c201617ada5b97314ad8567b0e5ed74909e25e6f147e2
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, characteristic of a link farm or SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely to drive traffic to malicious or ad-heavy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=heart+of+darkness+game+deaths PDF link annotation
    • http://nejamaranidirit.22web.org/13710859575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_6011e26d3410a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6021fa070d110.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/serijufimusifokage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd78327b4f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_603201a282581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451760/normal_600647eb3bd9b.pdfIn PDF document text
    • https://xasuzetevoke.weebly.com/uploads/1/3/2/6/132681443/528608b443f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/julaxel/golmaal_golmaal_again_full_movie.pdfIn PDF document text
    • http://divojeniro.epizy.com/cyber_hunter_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/punctuation_worksheets_for_grade_3.pdfIn PDF document text
    • http://rekekolulopar.rf.gd/61838775841.pdfIn PDF document text
    • http://ruxopagotar.epizy.com/57383524311.pdfIn PDF document text
    • http://xitisif.rf.gd/87256065733.pdfIn PDF document text
    • http://bojefej.epizy.com/aisi_4130_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/86728600508.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5056 bytes
SHA-256: 71959389394cf2bd70246aa6ff230ad61573836951325ca94f82f3f139a4db1f
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 9972 bytes
SHA-256: 36e7234d8f12139777bf738745b31aaf811a45fc9d2e9b39794f0ec45386e1c0
font_02_sfnt_off00011a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A13 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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