Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d43e3f29b03e24…

MALICIOUS

PDF

87.5 KB Created: 2021-01-25 08:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5c1cae155b453321592e2f32e5e3f72f SHA-1: 4b2f0318fd8dcdf7f1a9361d9fc786ed1dcc427c SHA-256: 32d43e3f29b03e247de556eee560d1a8e066ed73fc91519d392e49cf081dd117
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with 'http://detonic-shop.website/spacex_crew_dragon_return_dateool7w.pdf' being a prominent example. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/aws?utm_term=cron+job+time+format+in+linux PDF link annotation
    • http://detonic-shop.website/spacex_crew_dragon_return_dateool7w.pdfIn PDF document text
    • https://rapaxexujimina.weebly.com/uploads/1/3/1/4/131454932/jebaluzoboma_xovoviparukupaf_fopanimelop_bukaxegaligewa.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/hfCgjhb/kaiser_receptionist_jobs_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/chijchc/dotuxekidatejureban.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/gdgfZiX/ice_cream_cake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_600cba38c7e94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476782/normal_5fc757a38d4f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_60035d38e2688.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/2nidhjm/basketball_mini_hoop_target.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/zufaxepixiguxax/kesimekidekezukenoxuzin.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/international_business_case_study_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/ccs_university_exam_form_for_bba.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/fifakalokiroboseku.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_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 4924 bytes
SHA-256: ba8b5dd1ca4462d6476134e6dd13d4bcb2ce9a1f43333b4401af55c40aa6e836
font_01_sfnt_off0001244a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244A 13252 bytes
SHA-256: b47b3d8cb22824e6963b006c643d1b26cf55410ced59d62592ddbfbf365737af

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