Malicious PDF — malware analysis report

Static analysis result for SHA-256 456edecd7202398b…

MALICIOUS

PDF

72.1 KB Created: 2020-12-01 08:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fc455637a9fb716f5838cbcce74fe492 SHA-1: 14113154b9575535743309d6da13daf59c071e4e SHA-256: 456edecd7202398b83b6a02c072ecf09c6ac7b31fc27ae528559cfc98c9a1e53
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with multiple embedded URLs pointing to potentially malicious sites. The document body, though heavily obfuscated, contains references to 'informant drug dealer' and metadata suggesting it was generated by wkhtmltopdf, often used for creating phishing pages.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/aws?utm_term=informant+drug+dealer PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5fb3b69b1a2ca.pdfIn PDF document text
    • https://fuwanitawoge.weebly.com/uploads/1/3/4/4/134436239/papesirujomunowuvu.pdfIn PDF document text
    • https://puxolulif.weebly.com/uploads/1/3/4/3/134356270/6d664.pdfIn PDF document text
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/tipovusamo.pdfIn PDF document text
    • https://fuvewoziju.weebly.com/uploads/1/3/4/8/134883365/dezuvepimolone_josonufawilex_powosojomerib_durokizat.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/kudizurovunufej-fokugi-kalizanajapu-vixajexepudovar.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/1652015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fc1e39f778b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f89a5f1c81bc.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/sinamozagemoger/wifi_password_ethical_hacking_tools_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/50949314112.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_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 4984 bytes
SHA-256: 21c9379acf9d1d7037e084a8de9e57466a9d52d2750aa73e314e4e2f45063d5b
font_01_sfnt_off0000eb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 12744 bytes
SHA-256: 68406e9f84f9af5fd763d6267d083cf24e4a563243723676694bacdff7b0daa2

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