Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef102ab6d29599e…

MALICIOUS

PDF

75.6 KB Created: 2021-02-16 08:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8bd5244beb32aca239063d94c8509d16 SHA-1: 09eb8abb6ba172103ad935c918f5bd2b6324ac0e SHA-256: 0ef102ab6d29599eaf5a0142fe0719e1c9f9c2714b66b4247acbd34b6f7e501a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a URL that appears to be a search result for 'total money makeover workbook vs book'. This suggests a phishing or content-luring tactic. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, further supporting the idea of a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of external URLs and the ML classification strongly suggest malicious intent, likely to redirect users to malicious sites.

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://maypoin.ru/wb?keyword=total%20money%20makeover%20workbook%20vs%20book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412887/normal_5ff88e4a99bb0.pdfIn PDF document text
    • http://astrohelp.space/insight_ias_daily_editorial_answer_writing2vaxz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496001/normal_601c7a83927bc.pdfIn PDF document text
    • http://masajsalonunuz.com/49367401521s43lp.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/3648442.pdfIn PDF document text
    • http://bioforcecolumbia.site/menigatomibepixajapukizud7z2q.pdfIn PDF document text
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/nuzajotuz_funoled_kunomusosasi.pdfIn PDF document text
    • http://afracheat6.xyz/75265170569qnbq7.pdfIn PDF document text
    • http://save50.pro/34578267121t8vvn.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/xapota/philosophy_of_teaching_template.pdfIn PDF document text
    • http://wulimazef.epizy.com/annamalai_university_dde_convocation_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/77364406592.pdfIn PDF document text
    • http://poxabeb.rf.gd/alestorm_keelhauled_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/28228735500.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/anarchy_online_shade_solo_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0C 5240 bytes
SHA-256: 50040bf5c699260564ed5ce52a66b048cb235a3a35989e200b5d129d41deba39
font_01_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 4376 bytes
SHA-256: de455705823839f0172f8942a67f6847e3d9fcf75f463e94b417bbeab10ba3c4
font_02_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 13440 bytes
SHA-256: b24a92323a01b4d521961a4ad9392ed0d233f830487815117f34eecb6427049e

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