Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee989f468b1c413…

MALICIOUS

PDF

68.8 KB Created: 2021-02-25 22:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4e8688990a7f5ae7822ef2d8060050f4 SHA-1: 42cc132ea2660a4869ff3bdd474974fab321695c SHA-256: 6ee989f468b1c41392d4777c47645f8cd83e46613624343be76e8f5b8fcd4dab
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, characteristic of SEO manipulation or phishing campaigns. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/123?utm_term=casio+gw500a+band PDF link annotation
    • https://cdn.sqhk.co/zulatobi/dsifvie/kudoxitixib.pdfIn PDF document text
    • http://dkshlyap.ru/fododitizekijujeteroanfwc.pdfIn PDF document text
    • http://ideal-it.fun/17903691541rhavx.pdfIn PDF document text
    • https://surugatolezijef.weebly.com/uploads/1/3/4/6/134631687/d52d02bec.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/dhziagf/smash_drop_item.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5ff25778acc6a.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/evjfagd/zivavokuvif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_5fd1826616e1b.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/dilezetudekafurupidesid.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/gjihRuN/download_game_pixel_battleground_mod_apk.pdfIn PDF document text
    • http://hookup668.site/8292343409230myh.pdfIn PDF document text
    • http://it50disconto.info/rafegofonanivosugexow651p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466173/normal_5fedf975d980a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444377/normal_5ffcc5d1df286.pdfIn PDF document text
    • http://belldiscount.ru/5023900540279op6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jejevad.rf.gd/insignia_ns-sh513_reset.pdfIn PDF document text
    • http://rufopanapoxo.rf.gd/79495541265.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_off0000c407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC407 4976 bytes
SHA-256: dee085880831ad67dd209faf0b4528758df622a0af97d8f1ce468ab65690f039
font_01_sfnt_off0000d505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD505 10268 bytes
SHA-256: ac739f60a85f18040130691570e9efe51a90690af23f38092ea9de1a63d7db33
font_02_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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