Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d5ad05d643085c…

MALICIOUS

PDF

97.1 KB Created: 2021-03-02 01:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3970c1a99c9d18bede44da343c9315f6 SHA-1: c4f2373fce28d042b1a6cf6ef47650b6279b87a5 SHA-256: 66d5ad05d643085cb470a511de429886ca8934150ef8522c9719bafcf520bb7d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document attempts to trick the user into installing remote support tools, a common tactic for gaining unauthorized access. The numerous external URLs, many hosted on disposable domains, further support the phishing or malware distribution nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://jumiwimov.ru/strik?utm_term=crazy+rich+asians+2 PDF link annotation
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/0638e303.pdfIn PDF document text
    • http://sokfresh.fun/bsnl_recharge_plans_mpaugni.pdfIn PDF document text
    • https://zotawirimatoxo.weebly.com/uploads/1/3/4/0/134096886/zazebefobod_bewusivad_dunafalid.pdfIn PDF document text
    • http://rawenspant.online/85512923096cb0l9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_603bdd0599e68.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/8996703.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/XvTqWgc/wordmaster_app_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_603343f3de534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_602c065ce7a9e.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/aKgjheS/jipimazewupos.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/kutty_movies_2019_full_movie1s3tl.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/8Cjijcn/91328794812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_602c5cff9415c.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/b6a1e2ed60271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_60062aba9812b.pdfIn PDF document text
    • https://nakilogizo.weebly.com/uploads/1/3/4/3/134363069/1670826.pdfIn PDF document text
    • http://bachanalytics.com/logmein_sound_driver_uninstall_macxj7q3.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/th7Ugi4/ranked_choice_voting_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014acc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14ACC 24548 bytes
SHA-256: eb9c10d7904836f37ba0bb2fe60b51cc801d80e974c450b0ff4b5a9c5b74141d
font_00_sfnt_off000112b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B0 5044 bytes
SHA-256: 4943cb12e8299ceac01a7f99d8bdc63132f577510d362a7fa9ba1d7e72420c3a
font_01_sfnt_off000123dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DC 11364 bytes
SHA-256: 40796a08adb3256a415f6fe868172e5ab8ee06cb27bab9fc8ea8347eb784ff88

Open this report in the interactive analyzer, or submit your own file for analysis.