Malicious PDF — malware analysis report

Static analysis result for SHA-256 f563499a9d03afa2…

MALICIOUS

PDF

72.9 KB Created: 2020-11-20 10:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 25ff39ad0be83a8dbd2c202a11bfceb2 SHA-1: 16e3735acc83014c1a6a7e2a50b4f62cf97d37ba SHA-256: f563499a9d03afa29ad3f077db88e1da3ce0d8c45af9ae807c2a6b9f5836fa24
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffking.ru/123?utm_term=family+guy+another+freakin+game+cheats PDF link annotation
    • https://walisisatar.weebly.com/uploads/1/3/4/5/134576301/najamefomam.pdfIn PDF document text
    • https://povozunalurowub.weebly.com/uploads/1/3/4/6/134665666/fupuditab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_5f8ee4dfc2af4.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/votubukaxogilix/kuxojikejuxebarimup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332d1b26-b436-4c86-aab6-6d2b9217dc89/pathfinder_cayden_cailean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f864c3-93d5-4a04-ad16-4e8f06efbc65/gozubuwavizofudopak.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/bafuxora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b2de08-f307-4b80-bd53-89e94dc851be/44316699129.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/xebikiposis.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/integrity_in_to_kill_a_mockingbird_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/bill_nye_food_web_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/76204612598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7507886-7c0a-4f42-bb33-62f919ede2bc/mobovabodifokijatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de09758-d106-40dd-895b-2680db1dd108/tarot_shadow_work.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_off0000d067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 5300 bytes
SHA-256: 98247695ba770fe1be0c15358c4a90e98c8216d6e3e312b95497f127780125b9
font_01_sfnt_off0000e24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24A 11196 bytes
SHA-256: ed3251a2586834b573a9c41aa45fcf0571be14a49f772a76e1ab31a952ff130e
font_02_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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