Malicious PDF — malware analysis report

Static analysis result for SHA-256 597030101fed0f16…

MALICIOUS

PDF

70.1 KB Created: 2020-12-27 20:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b2b8edb3a1bad73dbc4ca1ec7718de1 SHA-1: c350bc3125152d6cda973bd0300f81cd185b6c64 SHA-256: 597030101fed0f16562e95cd650743b4786847d36498e68afdfa0a5c81974a9a
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The embedded URLs, such as 'https://gettraff.ru/strik?utm_term=sonic+boom+characters+as+humans', likely serve as entry points to further malicious content or phishing pages. The document's structure and numerous external links suggest an attempt to distribute malware or lead users to fraudulent sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=sonic+boom+characters+as+humans In PDF document text
    • https://cdn.sqhk.co/vivupedasez/ajfIgik/download_game_rush_racing_2.pdfIn PDF document text
    • https://kijufonujaza.weebly.com/uploads/1/3/4/8/134863317/45689c5.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/jW2geCa/fedekawuvuziraxexiruwevub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_5fa39240ba705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_5f951268d5eed.pdfIn PDF document text
    • https://zupufirelerige.weebly.com/uploads/1/3/0/9/130969681/refol_zoxexazu_tukufamane_fuzakix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459318/normal_5fa9a3bc6e4a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8866125c4c6.pdfIn PDF document text
    • https://wikexedijul.weebly.com/uploads/1/3/4/6/134659224/0827aa13.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/mogov.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/evhibCh/picsart_photo_background_hd_wallpaper.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/6215952.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/Gjduict/dts_play-_fi_headphones.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/fomaralunex/stihl_fs45_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/avellanador_manual_para_metal.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_off0000d62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 5248 bytes
SHA-256: 91117aa546862f59738b8326a48b2146d593bb147b8944663b89f671a3205d4d
font_01_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 10432 bytes
SHA-256: c1c18c9bf8c1e91ae076cdec2b46466c4da204771802f0857e0d93626d8a50ba

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