Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f1a63f0a7e93f9…

MALICIOUS

PDF

101.9 KB Created: 2021-03-23 04:30:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f87f750937a4e4a3221d7197936d6603 SHA-1: c9cb57fa8eacc344384792a05cc513ffc3401ee3 SHA-256: 34f1a63f0a7e93f9bdd2ab9c7129b9b2d2c4c6a2c6a7066163c2583847345c1c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The embedded URL 'https://zajinet.ru/wix?keyword=take+me+to+the+nearest+walmart+that%2527s+open' suggests a deceptive pretext to drive traffic. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=take+me+to+the+nearest+walmart+that%2527s+open PDF link annotation
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/ebf89a5e146ae.pdfIn PDF document text
    • https://voxujoponita.weebly.com/uploads/1/3/1/6/131607404/8233031.pdfIn PDF document text
    • http://mon-cmso.best/sebilimojuwud6nl0.pdfIn PDF document text
    • https://vabomunebalobi.weebly.com/uploads/1/3/1/8/131856010/xebasojane.pdfIn PDF document text
    • http://lisolu.org/apoorva_sagodharargal_songs_video3xlma.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/5f69472d.pdfIn PDF document text
    • http://www19216801.site/what_does_public_mean_in_public_relationskyab6.pdfIn PDF document text
    • https://miwimuwal.weebly.com/uploads/1/3/0/7/130775744/xutok.pdfIn PDF document text
    • http://startask.ru/count_and_noncount_nouns_worksheets_grade_4kpvzr.pdfIn PDF document text
    • http://rentline.pro/medical_science_physiology_salary3lrjg.pdfIn PDF document text
    • https://negogepif.weebly.com/uploads/1/3/0/7/130775604/vesiwubexizowebul.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/ee9881.pdfIn PDF document text
    • https://jupovibofekek.weebly.com/uploads/1/3/4/4/134490290/db2bab.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/17041eec-a9ca-4f15-97a2-ff401d1dd0e6/how_much_does_it_cost_to_rebuild_a_4.3_mercruiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76f1cbf-02c8-40c2-9a02-efcc192e17bd/vogekepaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206d82bd-602e-4846-a919-58147e688d9f/black_and_decker_toaster_oven_to3000g_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d2e0fb-9a77-4beb-83a6-f7a62d3bd4d8/nuweju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e43497-0405-4f32-95c1-53b84339a9e8/40596971372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d639b02-248e-433a-af7a-67760c533459/1649473335.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
font_00_sfnt_off00014963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14963 2912 bytes
SHA-256: 1dc4d53cc543180180c31573cc7ff31d5166e80dfe0f7d334e321c19e224dfc4
font_01_sfnt_off000153be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153BE 5200 bytes
SHA-256: 797300aa993efe0ea72d6ba23b90281ddcca0dd7ffdcd8f90196076ee00d52c0
font_02_sfnt_off0001655a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1655A 10896 bytes
SHA-256: 579ba2b5dda1087c71f44a4e2a2200f2c8d6c6f15391f36e6190a3db963e02c0