Malicious PDF — malware analysis report

Static analysis result for SHA-256 6604737297189c77…

MALICIOUS

PDF

79.8 KB Created: 2021-05-19 16:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d519f04526ea0eedaa31def6c5bbe276 SHA-1: 8925cbd90e12cab0598483b9472251bce41f23b4 SHA-256: 6604737297189c77e637b7a68b5fb45a77501c82b7b22fac7e4ae644c3cc6d65
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=codex+gigas+in+urdu+translation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467586/normal_5fe9f75502d97.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/pobakarimozeni_butoriwotos.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/083982d08535a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411681/normal_6003dbddab0d2.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/jiwezofiloposube.pdfIn PDF document text
    • https://magifoxokepo.weebly.com/uploads/1/3/6/0/136053300/powibofodatepuxotiki.pdfIn PDF document text
    • https://diwoneguni.weebly.com/uploads/1/3/1/4/131407083/pegumap.pdfIn PDF document text
    • https://joriwonakogilul.weebly.com/uploads/1/3/5/3/135305945/somovuletizexupak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fd047559b4ac.pdfIn PDF document text
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/9500155.pdfIn PDF document text
    • https://wosufixojiniki.weebly.com/uploads/1/3/4/7/134720754/javebol-zakaki.pdfIn PDF document text
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/3854503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408704/normal_6049801327f24.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/7146047.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/7329923.pdfIn PDF document text
    • https://vazozedirasamib.weebly.com/uploads/1/3/4/0/134013018/sukunusur_tumuxasutigefiz_vojimigusejanaw_tudefisam.pdfIn PDF document text
    • https://xobojurum.weebly.com/uploads/1/3/4/5/134599739/petorofirip.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/bulalowisu/shape_worksheets_ks1.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/circular_saw_table_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/mefumazowazudipulikumevak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03976f57-ca80-4bfd-aaec-3b39062b4faf/out_of_my_mind_sharon_draper_genre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d5879e-7d70-4045-b5b8-7be74cd5ad4f/kizijilutox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a7ed71-69b0-4ea2-8af2-167658b0a9b3/how_to_login_router_admin_pldt.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/the_metamorphosis_gregors_father_quotes.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_off0000fbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFE 4968 bytes
SHA-256: d89659daee0490134426f4c1063f2bfa6ea9dd6d438b44ffdec896288c84cc29
font_01_sfnt_off00010cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF4 10652 bytes
SHA-256: 97f7af77739c3ac06f7ef162bef320b5040a164e9c61a3502d19b8ed4a7d268e

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