Malicious PDF — malware analysis report

Static analysis result for SHA-256 5127654cd94e1739…

MALICIOUS

PDF

73.7 KB Created: 2021-06-02 12:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e1b8d7fc753ea9e28a1142e3f113c39 SHA-1: db7536d6f4ff7d2b494c5fbc4cb9144cd816b2d2 SHA-256: 5127654cd94e17394942f624f2d1739e0ed20b0140a313fe91aa80a6bb1a63cf
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous external links, including one to `https://queure.ru/pbw?utm_term=download+film+bulan+terbelah+di+langit+amerika+2+lk21`, likely to redirect users to malicious content or phishing sites. The PDF structure and the presence of many external links on disposable hosting suggest an attempt to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/pbw?utm_term=download+film+bulan+terbelah+di+langit+amerika+2+lk21 PDF link annotation
    • https://lesamasipedu.weebly.com/uploads/1/3/0/7/130739144/nobalozobunoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fcdccc948147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_606474604001a.pdfIn PDF document text
    • https://xemexetizepe.weebly.com/uploads/1/3/6/0/136094173/xenogagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_602cab53ce324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466151/normal_6049932e1613c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_6037efbda798b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485810/normal_60643f9e31da4.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/181c4576b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_6061360799c9a.pdfIn PDF document text
    • https://xofivexaroza.weebly.com/uploads/1/3/4/3/134321457/1512499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_605ab61a98904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462976/normal_5ff491d0087b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144498597/83527405101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2eedcd-7c7b-4005-b3c3-4acd8e42c458/absalom_absalom_chapter_7_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9347ed-eeb7-4ca7-a253-64a99b7612c2/tableau_de_comparaison_des_cellules_animales_et_vgtales.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144464832/vifodox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0ab5a6-0711-4bb9-a080-571098b4bf1a/83447838806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa6c6df-3626-4878-978f-5aad2fb0b1e7/guide_for_toca_life_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0ee214-5e17-4e24-9dc8-84c1eedf586a/26837819024.pdfIn PDF document text
    • http://zufumegi.pbworks.com/f/funapupozikunofodidaviwiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c532d5e1-f541-49b0-bb9a-2fda48fa3bd1/velata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92f9b3e-060c-405e-a9a0-39f6032b87b0/19711882415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604998e5-09f3-4e84-bbe7-290bc1d0a845/2007_ford_e350_owners_manual.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_off0000e357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 5620 bytes
SHA-256: 8aa5c94ddd81bce97f86fa5e5a9b22d3970a2a4d6d37cc9dbfa19e5041b4cb4b
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 10172 bytes
SHA-256: c0d7ff426e9ff2726eada14a72907539e1759a2f53af05778af667f9f2b09a4a