Malicious PDF — malware analysis report

Static analysis result for SHA-256 3267304762d8584e…

MALICIOUS

PDF

67.2 KB Created: 2020-12-03 10:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8ceac6b4fe2ed141591549ac7b2765f SHA-1: b65e0888839095b592d4ba1633b92a7c5bcb1526 SHA-256: 3267304762d8584e63a3eb26ec43dcc851a6c45fab1942b98f6f8432715a65cb
186 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 0.9998

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://traffnew.ru/strik?utm_term=apocalypse+of+elijah PDF link annotation
    • https://xogofabilubawe.weebly.com/uploads/1/3/4/7/134710923/8573245.pdfIn PDF document text
    • https://rikudebuwixe.weebly.com/uploads/1/3/4/5/134589128/29991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474987/normal_5fa62a5bbb8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5fa164d425fae.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/7428353.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/811328.pdfIn PDF document text
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/807130.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/606e2c45-d6f6-48d6-80d1-ad95fd04ec50/saxifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74c72fb-3461-4b87-baa5-815eb1b1212b/vigorol_liquid_hair_relaxer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d782be32-4aca-49aa-b21e-8eeb4cdb5d51/songs_about_long_distance_break_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374ee447-dcef-49cd-a098-df6a6e9e7b39/mevoxinipunetesizuzugor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db983c26-7c15-4188-93ac-17448f7f8153/cotton_creek_island_lake_il.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e006a879396864083677/t/5fc3847518e72e5fdb45201c/1606648952397/suzuki_violin_book_8_piano_accompaniment.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC470 5172 bytes
SHA-256: 5f29853a45801d6ea89afc2e1a5d5ad1012a328933646ede60bc254e29a387ee
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 12912 bytes
SHA-256: 024d8fc614c1ab032561bdbc7b024cfd098b9766b2383ca9482858ea8c93358a