Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7be6fcaeed9f786…

MALICIOUS

PDF

70.7 KB Created: 2021-01-25 10:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8f411435a9ecbc0a5881329493d3ed4d SHA-1: b7b48e73a6894fce3d44df7a7323dd468cc81760 SHA-256: d7be6fcaeed9f786d6b59c0de1713b992663b31539011ad6acde3e9739e9ff46
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 disguised as PDF documents with SEO-friendly slugs, indicating a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via the numerous external URLs. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=most+graphically+demanding+android+games+2019 PDF link annotation
    • http://craftsmansmetics.com/ceramic_craft_supplies_brisbanez2i6f.pdfIn PDF document text
    • https://finowizefi.weebly.com/uploads/1/3/1/3/131383614/jogem.pdfIn PDF document text
    • http://ukranews.icu/pick_up_lines_for_girls_to_use9wo5t.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/C1AIieV/eye_color_change_contacts.pdfIn PDF document text
    • http://remontlegko.info/marvel_runaways_season_3_castnfysr.pdfIn PDF document text
    • http://axecheat7.xyz/fantasy_defense_gate_breaker_mode47qct.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/balance_due_vs_amount_due_bank_of_americavr1ar.pdfIn PDF document text
    • http://airned.ru/fotor_collage_appll7q3.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/zidosozawok/zozewibafixazan.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/mufidisebaguzixo.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/vatususugego.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/jijuvatobawoni.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_off0000d620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD620 6076 bytes
SHA-256: 0a9901a22042bc540a6ce713da63dd745b9a8abe6cca6645fe669a3d14084d1b
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10180 bytes
SHA-256: cfa5aaac64b8a6beb7214e318bb1f37f014960cdd4f00f008c74024aef967049

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