Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af7a3a89d874cf3…

MALICIOUS

PDF

67.4 KB Created: 2020-11-19 08:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e2863ca08919e97da1120efd18c30064 SHA-1: 90ac8e86bfeb57fa2042af917bb59cc023ac96ef SHA-256: 0af7a3a89d874cf3afe93397d52106d1050d1affe74b5d7e47a68c037c6a30ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://traffine.ru/123?utm_term=boston+cruise+terminal+parking+rates PDF link annotation
    • https://sajepenimeb.weebly.com/uploads/1/3/4/3/134368310/b3903ae278678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5f8fcaa0ada06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501774/normal_5fb57a1a3bdfd.pdfIn PDF document text
    • https://fivojesivi.weebly.com/uploads/1/3/4/5/134596901/c6e8fe4c.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/7216232.pdfIn PDF document text
    • https://miwujiloj.weebly.com/uploads/1/3/4/3/134333625/gofewad-puvod-fikiwofad.pdfIn PDF document text
    • https://wekonopu.weebly.com/uploads/1/3/4/8/134848362/tamirupajisad-fukajogixirox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fa211025da62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fa34c276d26e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_5fa6b8227a392.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/e8a9d4b1f3.pdfIn PDF document text
    • https://fijoduvinozis.weebly.com/uploads/1/3/4/6/134664683/sewute-pifaxeritetax-buwumam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bf87d7-a32e-42ed-b5b7-b14f0572cdda/anglo_saxon_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253714ee-ef12-448d-ac55-c23aa10e906a/finewepeposonexexipubofub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C4 5364 bytes
SHA-256: ce6be738df76aa4ab0211d70eb1074be57743cdfc7413ed96c41b88b1171222a
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 10828 bytes
SHA-256: 38b268abffb418e20075aed934b867dff5cb3d68ad399da4a00f2c9931c5e8c8

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