Malicious PDF — malware analysis report

Static analysis result for SHA-256 28029e69e99820ea…

MALICIOUS

PDF

91.9 KB Created: 2021-03-15 14:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 29e8032d1119d0d7606cfd1162a648e7 SHA-1: 2ab3eb0ba3c2b46d00ca8c5f1451ed86d6e6820d SHA-256: 28029e69e99820ea39634082317990b9a4dc0c913721aa56e6b947e687237c34
206 Risk Score

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 0.9988

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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/award?keyword=learn+python+3+the+hard+way+pdf+4th+edition PDF link annotation
    • http://pajuwepubawip.sportsontheweb.net/autodesk_bim_360_tutorial.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/witebudir_zeputanef_refebagawifijod.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/zuvub_totapufufoxa_zuwukumujinege_risuvef.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/deroja.pdfIn PDF document text
    • https://zavinuso.weebly.com/uploads/1/3/4/4/134461772/wepijunil_pulilojupobago_mikubofek.pdfIn PDF document text
    • http://copyright-infringement.business/lokusawajuga6qpl.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/43214219456.pdfIn PDF document text
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/majavofuwewob_vikivolav_vesufijuzagub_lutekojabo.pdfIn PDF document text
    • https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/521f86de0bde69e.pdfIn PDF document text
    • https://regivuno.weebly.com/uploads/1/3/1/0/131070843/08db8d.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/rusiduzopuzis.pdfIn PDF document text
    • http://kyponnik.online/bandcamp_er_android_apphr2xg.pdfIn PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/mabulowije.pdfIn PDF document text
    • http://sodahq.pro/38230675109pv590.pdfIn PDF document text
    • http://summer-italy.fun/5349068986ug3c7.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/bemba_names_and_their_meaning.pdfIn PDF document text
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/9576651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_b1d456514d954d32a75d4bc1622d15a8.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_60d274b7e7ba478d8424095686ab9716.pdf?index=trueIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_ded17771b28d490296433b6b467e982f.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_8b375cebc81b4f5b85483f5dd7107340.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b672a2d4-3dff-45ea-a8bf-89735f1fb968/50495187788.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/64642639633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3771b8ef-d674-44b9-9bb5-ba660a05a078/la_venganza_del_conde_de_montecristo_pelicula_completa_repelis.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_off00011b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4A 5096 bytes
SHA-256: 9a885c658f2d7b5b55861d7c502f576141441168df1320bce574eb660676539d
font_01_sfnt_off00012cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 11368 bytes
SHA-256: 9bc486fb7e38f2de125d2c4b919000ef4931e7c2409492c4b46e298133f1f996
font_02_sfnt_off0001536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3