Malicious PDF — malware analysis report

Static analysis result for SHA-256 53fde64bead68f26…

MALICIOUS

PDF

101.0 KB Created: 2020-11-20 00:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3538024e296eb88e62876e88fc1f0102 SHA-1: 063c80e5c4671541039281d6e267ece2059e5d3c SHA-256: 53fde64bead68f265f88e413d64d056c1f36aa907b6a9feea56eb727de26251d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to 'traffking.ru', suggesting a phishing or malicious redirection attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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 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=my+brother%2527s+husband+volume+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5fa6c9c146b06.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/zemajuned-jaxemomatax.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/700df18b-4232-4dca-80e7-2801f812d198/66519184285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ec30bc-6996-40ff-aa5e-d5eb826020a6/sejoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e3daff-f43b-4875-8b92-5be523da1d85/40252589929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bda15e-b2e0-4993-8045-7ec8703087be/55281604080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904bd56c-40d2-44c7-93be-0d614d9ad7ae/jixipewabiwegexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b03df2-6124-499f-a40d-f38ff691c7c2/gelipuradozifivupi.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/nonuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/asbestos_awareness_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90c17ab-fae3-407c-86c1-6e3458162989/gabofapemupuvakeb.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/60654627577.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/94300798526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9825ab-99d3-4893-abef-dafa5abc39c3/italian_baroque_artist_battle_scenes.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
stream_002_off0000e915.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE915 31708 bytes
SHA-256: f49b7f396b3b88bc001448d77a34b93626c9827e4949262f6efa8465dbcaba23
font_01_sfnt_off00014b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B11 5572 bytes
SHA-256: fd1a93219d4dba16345b1008469a768374b09de62587d5ab72f0060f8aaf0a53
font_02_sfnt_off00015df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF4 11724 bytes
SHA-256: 31e7883a7aef1d58d282b61af0088842705cbb255f2209ca244e11ec098c689f

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