Malicious PDF — malware analysis report

Static analysis result for SHA-256 befaf730f7309a01…

MALICIOUS

PDF

83.4 KB Created: 2021-03-29 16:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6421fff5ce05ddecdacd003ead308f2f SHA-1: c4e574b7e6c36c174a851994c4bc58ce5a0c5782 SHA-256: befaf730f7309a01ca6823ef9a03967432a38cd259bbda145ba9a9cbdb0fed7f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a workout plan lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to malicious sites.

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://jacksth.ru/award?keyword=workout+plan+for+muscle+gain+and+fat+loss+pdf PDF link annotation
    • http://nafarami.medianewsonline.com/92252836175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493876/normal_602e7c6ef141b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491436/normal_5fe1c0b5eebea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_605ff147e8dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_5fd6ef7d25541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407781/normal_6015392af069b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_5fedcc5ff0913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489593/normal_604b269232985.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://sibubixusa.epizy.com/71690205613.pdfIn PDF document text
    • http://vudidesodus.epizy.com/action_potential_psychology.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_6d1b13e300094ccbbaa122d1cd0a6e1a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dedd70-7ca3-4c3b-8763-4bd57ba4c349/nikixopedunijupezeg.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/86681787543.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_1559008355d248febdabd3f6ad59cfa6.pdf?index=trueIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_d60676f51c7540e5ba8aef4780f877b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6264922a-bd53-4f09-bc89-9cd1bf2f6807/74069766494.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_f1808ac84ce545af8ee21f38df42fe17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c15095-2663-47ce-a867-b3bfd0e9d53d/fewavosemizapusavukal.pdfIn PDF document text
    • http://funakata.rf.gd/balukevowaxexuwalibuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac5c992-d078-4815-a29f-14599c95d837/litany_of_humility_prayer.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_off0000f9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A9 5436 bytes
SHA-256: dfb88478e21d860eed2e1cc2aa0f826f21058d60370c2e73d2ec445593a2a160
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 11228 bytes
SHA-256: 81fee0545165dc7da83213752465668f7a4b9e11a50d9046dd40eb6f99b6199c
font_02_sfnt_off00013205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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