Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f1dcda1944c943…

MALICIOUS

PDF

65.2 KB Created: 2021-03-23 14:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 68bc081a045f631ca12b0fb6df87b1ed SHA-1: ebd2f70e7e2825803fbc50550edbd2c9060ee9ac SHA-256: 34f1dcda1944c943f12857f6a33e2fa7bf4ed59bfc9307aaacfd018f41ceeac6
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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://golowaki.ru/wix?keyword=pokemon+glazed+apk PDF link annotation
    • https://gedibaforajipet.weebly.com/uploads/1/3/0/8/130874683/5afe9073621c4.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/VijThhU/7469881463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5fd8b5e81e9cd.pdfIn PDF document text
    • https://runuwafulisejet.weebly.com/uploads/1/3/5/3/135337902/4510505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_6022a3e085598.pdfIn PDF document text
    • http://vatosake.iblogger.org/67658065542.pdfIn PDF document text
    • https://cdn.sqhk.co/pelonulu/sdhgihn/finders_keepers_movie_2017_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481052/normal_5fec146f5358a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fff794978164.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/ggialib/45422898450.pdfIn PDF document text
    • https://cdn.sqhk.co/sofopiro/eijCChb/country_music_singers_female_list.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/ighcihr/skate_dice_simulator.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/9960926.pdfIn PDF document text
    • https://finazevad.weebly.com/uploads/1/3/0/7/130739247/46fa5c2d4fc.pdfIn PDF document text
    • http://lebanage.iblogger.org/mycobacterium_tuberculosis_treatment_guidelines.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/debevepawukopiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wapukum.epizy.com/storyboard_project_proposal.pdfIn PDF document text
    • http://mumidukegex.rf.gd/kilalimagegirakinugut.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_d57d08203bdc4e89b8c5b5a6c601e6c6.pdf?index=trueIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_6745966ff51b44559bfda017b1c3a91d.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_9265ba35ee584adfacd1eafe5860b881.pdf?index=trueIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_a203a34ee82a40219e6afe5b0081888b.pdf?index=trueIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_318a5a53e261449f98c49b68dbbb8902.pdf?index=trueIn PDF document text
    • http://tatasoge.epizy.com/11690978400.pdfIn PDF document text
    • http://mefugoniwiw.epizy.com/nuzavu.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_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 5120 bytes
SHA-256: 0974bd66a7606f7c63d084d08743cd34a6ab7d0e756c129b00231aa2438902fe
font_01_sfnt_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 9052 bytes
SHA-256: 46aa6f7299d991729c1acaeec9644acb9b7ff296dd6be2f07c620beeb353f398