Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab77d792f8fbf798…

MALICIOUS

PDF

83.7 KB Created: 2021-05-18 14:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 366b74f2dc1124d4a8d56ab71d7e9922 SHA-1: 595bfa8364a5c5ada0606a0b472f97b60203aaf4 SHA-256: ab77d792f8fbf798a29d64c3639aefab643651fe5c939beef7e9a91978d6787a
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 0.9997

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://baarspo.ru/strik?utm_term=adobe+acrobat+pro+dc+serial+number+location PDF link annotation
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/1064385.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/najorixoxu-lireme-nerese-kixewu.pdfIn PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/bec8675.pdfIn PDF document text
    • https://ponixetuga.weebly.com/uploads/1/3/4/6/134668384/memopijetami.pdfIn PDF document text
    • https://vabekozel.weebly.com/uploads/1/3/4/4/134487462/gipexub.pdfIn PDF document text
    • https://tojawejememu.weebly.com/uploads/1/3/2/6/132682640/b9ce372c226df.pdfIn PDF document text
    • https://xatawozenovug.weebly.com/uploads/1/3/4/8/134886035/346ae2ebcacb8.pdfIn PDF document text
    • https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/vurebedufedufedusawu.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/wirogetu.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/90db9ee.pdfIn PDF document text
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/a92d7384e98.pdfIn PDF document text
    • https://paripipedaninez.weebly.com/uploads/1/3/4/4/134444050/3872280.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/c7c5c7e66876.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/19c94c16-4543-4bb6-b25d-c1f060313933/durivekuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/ford_302_rebuild_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/52638040719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b1773e-7140-4cd9-bb42-d7661e0c0e9e/59496197796.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/action_movies_2019_hollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/nejukesegixukerefun.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/ip_calculator_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5701059f-d711-4935-8e08-9cc73d3e9ca4/31569194340.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_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 5348 bytes
SHA-256: 14dfc74a6f55c67a94be564dfb06fc699e2d5502d5bfb26a9ae3b2901af37d21
font_01_sfnt_off00011c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0A 10916 bytes
SHA-256: e49ee15b601ac1cf30f5e2d5efa8fbfe477b5bbfeff5278a1331b1147c8fae0a

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