Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e53f31d2e1e213…

MALICIOUS

PDF

76.6 KB Created: 2021-03-21 05:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a3fb350b43efad5a65166d3896d08108 SHA-1: 8f8d971ca457cff7276d51a42b8e85d2d1e49240 SHA-256: 04e53f31d2e1e2139789a7b3cf896e4f924c283d800912c40a050463dbe21d89
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. One of the embedded URLs, 'https://seumenha.ru/wix?keyword=unilever+free+samples+philippines', appears to be a lure for phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=unilever+free+samples+philippines PDF link annotation
    • https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/7316200.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/6435616.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5ff27cd9dac19.pdfIn PDF document text
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/a10c0.pdfIn PDF document text
    • https://zofiludel.weebly.com/uploads/1/3/5/3/135347527/94a546436dc6485.pdfIn PDF document text
    • https://pinuzika.weebly.com/uploads/1/3/4/6/134640149/kiregevok-bosuwizolog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_5fda69db28f4f.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/01a59ef8-e245-4e72-879a-89140f5267f8/lasko_tower_fan_ionizer_review.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_65b83b3c5afb46888aa1fe4d2461a199.pdf?index=trueIn PDF document text
    • https://8ed7ad90-0d0e-491f-9c15-1f6cd5a61d18.filesusr.com/ugd/f1a804_4f929aad3d524339b1cf261d0f3e6fb5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2001a64d-b5a6-4349-a56e-a4b8bc1b28a9/80665301071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae26a945-5a54-4dbf-a78e-854f9936d457/geziwewadologapeniz.pdfIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_996e46fe303a43d3a021f24e0e009260.pdf?index=trueIn PDF document text
    • http://sidijujaz.epizy.com/bindiya_bole_kya_bole_dj_ringtone.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_aa04d27b64c24ba6af09ec9aa8ebf29b.pdf?index=trueIn PDF document text
    • http://vegexiwijije.rf.gd/muxulesu.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_cfa597e3b7eb419abe27622ae3513e69.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d675b495-ccb6-4946-a96f-c9e6c3ca03cd/jubufisejan.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_53b78d67be0a45b1a537b0fc4d519a3e.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_22490f38461d4a26a1e4ab6a8b998fcc.pdf?index=trueIn PDF document text
    • https://71b34470-2e60-4936-811b-9f14cb47e32b.filesusr.com/ugd/1dbbf0_4d79209aa3414b0eb836af0625657af7.pdf?index=trueIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_6193f1a468e44baeb717d8d491b53d79.pdf?index=trueIn 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_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5192 bytes
SHA-256: 1c20deee0376cd2d6d31ed08cbcb8e2695a291eb542c3d9a731d8f72db9c1dff
font_01_sfnt_off0000fdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB3 11056 bytes
SHA-256: c1d59d10b34dcc43c5eab207cf78a9c7e77e15f3cf81624c180062e97ea54076

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