Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ba99a967d1c376…

MALICIOUS

PDF

78.8 KB Created: 2021-06-09 23:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72c27229f10099dace47da9656894ab3 SHA-1: e9430d38042b595f58e46c78465e0e332e081308 SHA-256: 19ba99a967d1c376b1060aca119c1cc9f3f74c63e32bf39cac41b1a1174cb6b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body references 'Fortnite mobile in play store', a common lure for phishing or scam attempts. Numerous external URLs were extracted, with one pointing to a link farm on disposable hosting, suggesting a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://inwebjor.ru/pbw?utm_term=fortnite+mobile+in+play+store PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483335/normal_5fed3073b7f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fe6f8e81b727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd319d3e70d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477916/normal_5fd34ca1826cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_602c4d40702cc.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4388613/normal_60b05f9954bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455894/normal_5fcb497cd3521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405190/normal_60253cb75da67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5fec93c950e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5ffa6117a0e97.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475725/normal_60b314c3088c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_605fbeaf50592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_60584eb7b7481.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
    • http://vowetegaperi.pbworks.com/f/10_minute_yoga_for_beginners.pdfIn PDF document text
    • http://mizelabe.pbworks.com/f/22798719047.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/reach_compliance_statement_template.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/f/jeff_seid_full_week_workout_plan.pdfIn PDF document text
    • http://divogatupum.pbworks.com/f/what_is_the_last_calvin_and_hobbes_comic.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/w/file/fetch/144571935/free_homemade_chainsaw_mill_plans.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/54709872272.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 4952 bytes
SHA-256: c764302b682f727f6da649ec205668b8cbd3eb2b64511740a54a917d02423894
font_01_sfnt_off0000fa91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA91 10828 bytes
SHA-256: 7286a51741ac06ee23524219c00e9e548ef065ce3a8271ee3cd6e459041350a2
font_02_sfnt_off00011f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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