Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e95999cce348c7a…

MALICIOUS

PDF

71.2 KB Created: 2021-02-17 20:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: df296217b9e6292a3c6d5b6baa863884 SHA-1: f622428a0250315d086074710dd118966d2f4b10 SHA-256: 6e95999cce348c7a7cbf8ed5e5552f32dbadcb477635cdfa01b49808d6695447
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains text related to 'foster parents' and 'nc', likely a lure to entice clicks on the malicious URLs. The ClamAV detection and ML classifier strongly indicate malicious intent, likely 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://bologen.ru/strik?utm_term=how+much+do+foster+parents+make+in+nc PDF link annotation
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/081072dc43b7cb5.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/C8ORiat/32296492447.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/TQSHc0P/pixel_gun_battle_pass.pdfIn PDF document text
    • http://jinosewifuwefe.22web.org/xelapivikalep.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/dugevotomaforakanose.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/home_loan_emi_calculator_excel_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/hjaicje/get_free_gems_monster_legends.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/tegexokipefef.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/negenekejaxowebedaf.pdfIn PDF document text
    • https://cdn.sqhk.co/ferudati/Z2mbjKI/what_is_my_smtp_server_name_and_port.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jf7xT4D/abalone_price_per_kg_in_philippines.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirevotijo.epizy.com/jupekawazo.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/vafigelirivukonet.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/arashi_ni_shiyagare_episode_guide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/9512068521.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/belleza_regular_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/mimanojonesixosivixef.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/data_structures_and_algorithms_in_c.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_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 5480 bytes
SHA-256: 169770664fef501f4d18dad9802dcf4de0187f7685c00eedd4af96a775bf35ea
font_01_sfnt_off0000e8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E0 11440 bytes
SHA-256: 9661aefafe77cd88f524f0e8baeb6568ed724b58d3bf85b199a59f212ab87448

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