Malicious PDF — malware analysis report

Static analysis result for SHA-256 afab9042d41e0880…

MALICIOUS

PDF

73.4 KB Created: 2021-02-18 10:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8391109feaadac70758bba8441e8784 SHA-1: 63a70a9baf68a7ab1e87e6a35f73638d1896b66b SHA-256: afab9042d41e0880f6655d331bbfe0749011aa30638ea11758dbc8ce8f7f0080
244 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector and a credential phishing lure impersonating Microsoft. It links to known malicious infrastructure, specifically a redirector at 'https://yafferge.ru/wb?keyword=icao%20annex%2017%20meaning' and a Weebly hosted PDF at 'https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/300d3f063e78.pdf'. The ML classifier strongly supports the malicious verdict, and ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/300d3f063e78.pdf.
  • 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.
  • 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://yafferge.ru/wb?keyword=icao%20annex%2017%20meaning In PDF document text
    • https://cdn.sqhk.co/zativojor/Cgjiaii/why_did_chicken_cross_the_road_answer.pdfIn PDF document text
    • http://alcexpress1.xyz/756944113290ygbv.pdfIn PDF document text
    • http://1xbet-football.fun/zivaxomixesuduwepofjo5to.pdfIn PDF document text
    • http://prod-fruit.space/tidexexudimusojmk15.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/0jckpb0/is_all_smart_balance_butter_dairy_free.pdfIn PDF document text
    • http://vedice.ru/linux_os_interview_questions_and_answers35qep.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/300d3f063e78.pdfIn PDF document text
    • https://jejofiwapo.weebly.com/uploads/1/3/5/3/135312812/wodasuki-famixifijatoni.pdfIn PDF document text
    • http://nudazizefa.22web.org/suspicious_activity_report_form.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/3geiijb/lerodaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_6019889c8fe95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ximupuv/lagu_felix_always_be_my_baby.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/jadomujalebadaluvi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/learn_spanish_beginner_book.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_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 4948 bytes
SHA-256: 17382fad4febbc753f6667ed92335e211865d488719436f3256af7fbfa0cc34b
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 10484 bytes
SHA-256: 5f943a0bbef093f72bc0348c948a62453c32a5921789d5b8b342af872c2c2469

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