Malicious PDF — malware analysis report

Static analysis result for SHA-256 0479ea084b430fad…

MALICIOUS

PDF

78.4 KB Created: 2021-05-08 18:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 83002afff909dbf0bbba0c8a32efbc97 SHA-1: 1c787784df12be47f8a51b51c2dd7e9126a8d281 SHA-256: 0479ea084b430fadcb32c3e7ddef0573381358c76681efbb3866723e0efe8ccc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with a significant portion hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to lure users to malicious sites.

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://vilenefex.ru/strik?utm_term=how+long+does+a+trane+last PDF link annotation
    • https://zanafulifefa.weebly.com/uploads/1/3/4/5/134596365/sovebos.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/gFthh7U/mufumololo.pdfIn PDF document text
    • https://befapoge.weebly.com/uploads/1/3/1/6/131637854/dutasopinabi-dojatiwenokik.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/jotawililasepu.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/rhidaie/51122403383.pdfIn PDF document text
    • http://rujisuki.mygamesonline.org/apprendre_a_lire_la_partition.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/ahe3hjR/52719251057.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/jzyk_angielski_sownictwo.pdfIn PDF document text
    • https://buvonumonub.weebly.com/uploads/1/3/5/3/135304713/9784547.pdfIn PDF document text
    • https://besikutusesa.weebly.com/uploads/1/3/2/6/132681218/vixex-watux-kusoridapub.pdfIn PDF document text
    • https://daxuvinu.weebly.com/uploads/1/3/2/6/132695190/basuzidudinox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/ariens_8hp_snowblower_carburetor_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e84898-7633-4589-8c3c-6d9a16ca8985/2018_ford_mustang_convertible_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/lukibo.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_78ba6678e80c4505951d824cd246b93c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab505b8e-b5ae-4d15-a8c2-492669043f2b/octavias_brood_summary.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_0e79d869220348bca4a6c7376994f4c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fb8191-16e5-4a69-a765-de17e0c4c4bf/maytag_dishwasher_200_quiet_series_manual.pdfIn PDF document text
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_19d52b6ffc6e4076a5ab482a958542eb.pdf?index=trueIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_17fa30c2def34a26a03e0260f41cb28c.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_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 5044 bytes
SHA-256: 2d64f43e02be8bfe2d808adb38333723219c40d4f92f282267eee5cf2e1896c9
font_01_sfnt_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 11076 bytes
SHA-256: aabca5c3d5e1080ef42eb8aa76448c391571e9c02c4f0e3cc1ab2a90e8ff6c76