Malicious PDF — malware analysis report

Static analysis result for SHA-256 58355041377e9550…

MALICIOUS

PDF

82.4 KB Created: 2021-06-01 22:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f60eccee08d027d78fa69edad109af6 SHA-1: 7bc9b2ac317ff32c0d3acc26dbe0804330774bcf SHA-256: 58355041377e95503639a45f4a363635b142d8fe966e5a439ba43819e829a5e5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to PDF files hosted on Weebly, indicating a link farm or a distribution point for further malicious content. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://parimuxuroz.weebly.com/uploads/1/3/2/6/132682994/933b88.pdf
    • https://vujoxakot.weebly.com/uploads/1/3/4/3/134318531/nafumavogujese_dakad.pdf
    • https://takewozijofu.weebly.com/uploads/1/3/2/6/132682119/kabovididiwimo.pdf
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/nusafelewo.pdf
    • https://cdn-cms.f-static.net/uploads/4490250/normal_6046f2d6bc997.pdf
    • https://gikijeza.weebly.com/uploads/1/3/4/4/134465371/9264556.pdf
    • https://fidunisowasewi.weebly.com/uploads/1/3/4/5/134599354/fudaxu.pdf
    • https://kivowitu.weebly.com/uploads/1/3/4/7/134703836/tanefuxezobe-zimolalapiz.pdf
    • https://jojixisobimat.weebly.com/uploads/1/3/4/7/134771177/6761609.pdf
    • https://nekurunezofadi.weebly.com/uploads/1/3/4/8/134892804/6428066.pdf
    • https://static.s123-cdn-static.com/uploads/4412394/normal_5fc63ef97b284.pdf
    • https://zanebereraba.weebly.com/uploads/1/3/4/4/134472179/3825430.pdf
    • https://jikanozirupeson.weebly.com/uploads/1/3/4/6/134656521/646b9be32ce743.pdf
    • https://luzenage.weebly.com/uploads/1/3/4/3/134317967/ligapegarufeves.pdf
    • https://bedeliwukaror.weebly.com/uploads/1/3/4/5/134512578/fikimonatameju_varuzapuzotiwi.pdf
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fe150ecd3f11.pdf
    • https://nugezufetewivu.weebly.com/uploads/1/3/4/5/134598593/3036910.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Xr6F2PkPTcg/wb?keyword=honeywell%20quietset%20tower%20fan%20hyf260%20vs%20hyf290
    • https://uploads.strikinglycdn.com/files/2f89fcfb-a3cf-4b08-8223-d5e144cf4d5e/ejemplos_de_ejercicios_de_permutaciones_sin_repeticion.pdf
    • https://uploads.strikinglycdn.com/files/48d77240-cb17-4d83-877b-6a98925a8fcf/34253736296.pdf
    • http://lugozamuxika.pbworks.com/w/file/fetch/144411849/20_laboratory_apparatus_and_their_uses.pdf
    • http://pamotekegopa.pbworks.com/w/file/fetch/144470808/boards_and_beyond_step_2_review_reddit.pdf
    • http://xetibubib.pbworks.com/f/farming_simulator_18_android_apk_obb.pdf
    • http://wepoline.pbworks.com/f/92543229886.pdf
    • http://jobojifitin.pbworks.com/w/file/fetch/144452142/47697017271.pdf
    • https://uploads.strikinglycdn.com/files/47cb2165-204c-4dbd-a406-a06d4dc6777e/vafew.pdf
    • https://uploads.strikinglycdn.com/files/37ecc380-fa3c-4ad9-a327-ae60a4d1be31/hayward_pool_vac_navigator_replacement_parts.pdf
    • https://uploads.strikinglycdn.com/files/c9c30663-acba-4021-96ae-9ae6d41f2fde/35980724140.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101af.bin
3444ca8d45d729a17e53b3cf6368e3b33e1538f18172ae9ef982ae6a0327615d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 5780 bytes
font_01_sfnt_off0001156b.bin
a0dab68634f03ff648c0a0916c7b4cd496b970f4f4f7949f8c2256806ca36d2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1156B 11224 bytes

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