Malicious PDF — malware analysis report

Static analysis result for SHA-256 e049babcd0fe6643…

MALICIOUS

PDF

96.3 KB Created: 2021-05-16 05:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b8bc214ed613317bbe29c8d7061d4fce SHA-1: 9ea71114c3549e34d97e4ebe76ee175cce11c9db SHA-256: e049babcd0fe6643f095a15a8c95f7228c56a0e6a61ec5ff582bdc7ebee00959
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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=if+you+stare+into+the+abyss+movie+quote PDF link annotation
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/b1371c2b80217c.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/listado_de_adjetivos_en_ingles_y_espaol.pdfIn PDF document text
    • https://tifuxifig.weebly.com/uploads/1/3/2/6/132695942/kezibubolasu.pdfIn PDF document text
    • http://xitigedomure.66ghz.com/june_2017_sat_answers.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/45221905097.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/49478281016.pdfIn PDF document text
    • https://mututekabifu.weebly.com/uploads/1/3/4/4/134466573/a92aab4dbce37.pdfIn PDF document text
    • https://gafeziluwer.weebly.com/uploads/1/3/4/3/134310472/tumonusesalopusa.pdfIn PDF document text
    • https://dexajaxalujum.weebly.com/uploads/1/3/1/8/131857565/pudixomutagezaz_luwefo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_83d14ac3b899478c947578a8edf41059.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c64529e-ae2f-4699-8a10-ccee44ae0ff0/59000012850.pdfIn PDF document text
    • http://tunufefenus.rf.gd/bezudiwugagalufisibidiw.pdfIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_b74834f1902a47ad95cc07d4b299f8e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a87ac8-2296-4839-905a-1c970d37e1d7/toloboxudarupagoxi.pdfIn PDF document text
    • http://lefumus.rf.gd/dojisutavivaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2492225f-4baf-4874-aad9-502ab96e7313/95735692236.pdfIn PDF document text
    • http://xiwularofevomu.epizy.com/abomination_darkest_dungeon_guide.pdfIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_4d93f2039c5145ac8fe4cd0fe77a8aab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4359387d-0f5a-4a3d-85cd-17502c47b445/74158548366.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/diana_guide_jg.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/diperobovegijejifak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36da5065-5386-4ccd-98a0-04c4ca2bafb0/zirovuzutotovuxovexojelub.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_off00013b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6A 5340 bytes
SHA-256: 0fc9686cab1a750f463b9fa7e0494678870f3b210ff3e72c9ec7d8976727ef1e
font_01_sfnt_off00014d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7F 11468 bytes
SHA-256: 1c263eb7258d94d672cfae401dfc2fb7b438f438f589101bedf35123e163a0fe