Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f52d6993d3dd99…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 04:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0f18960b0b0aaa2227ab7302f909f44b SHA-1: 5df2db368701edf8d8c12cca74d270368a945ab5 SHA-256: 92f52d6993d3dd9978c075959d0761622dd8654390101a354b480e14ba2672d1
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to mimic a search result, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://ponafet.ru/aws?utm_term=how+do+i+manually+drain+my+lg+top+load+washer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414687/normal_60386c3a36aef.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/Higijig/73075533047.pdfIn PDF document text
    • http://reduslimitalia-official.website/abraham_lincoln_vampire_hunter_bookei412.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/hhgcLji/basketball_legends_halloween_unblocked_77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_60003ac610c17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_6042221888a5e.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/2651310.pdfIn PDF document text
    • https://gidelusibi.weebly.com/uploads/1/3/4/0/134040719/79985e0e65141cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/g7M5Chf/sezezapopi.pdfIn PDF document text
    • http://electrumwallet.buzz/adjoint_matricesdavei.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/bozorinugeveped.pdfIn PDF document text
    • http://romigeguwapefi.22web.org/suwepulukupajesejosasopob.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/washington_state_football_coaching_staff_2018.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/9eaf44c86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5fc6a7a4393fb.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/pipaki.pdfIn PDF document text
    • https://rewumakabaw.weebly.com/uploads/1/3/4/8/134856880/c81e861f.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/excelsior_college_cost_of_attendance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://janenukexozi.epizy.com/puxuka.pdfIn PDF document text
    • http://pafapijeneradab.rf.gd/cpm_algebra_2_connections_answer_key.pdfIn PDF document text
    • http://zotomamomi.rf.gd/27159561556.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_off0000edf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 5528 bytes
SHA-256: de6358ea48a2f1c8569784e8eaf73bbe003a0e156d9ec450fc901de62aa591b3
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 10656 bytes
SHA-256: 853a24dd4f5840ece5b3cad2c655303b8060955e9a3e2ec7c9bef62b1d8f270e

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