Malicious PDF — malware analysis report

Static analysis result for SHA-256 c194ab59fc17b9fb…

MALICIOUS

PDF

68.6 KB Created: 2020-12-30 07:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 932f7cdb00a1b80928be7dd14668a5ae SHA-1: 16732f2074f704085a441dd1b6dc162f89a69f27 SHA-256: c194ab59fc17b9fbd2adcc6e5486270d3c3cc3771d7eedbd3c253fadf1c89645
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs, such as 'https://traffmen.ru/wb?keyword=jamman%20express%20xt%20looper%20pedal', likely lead to phishing or malware distribution sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/wb?keyword=jamman%20express%20xt%20looper%20pedal In PDF document text
    • https://cdn.sqhk.co/zupodejadofe/fgjQidV/cake_recipe_without_egg_oven_and_baking_powder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fdaffe25951c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451955/normal_5fc84958e69aa.pdfIn PDF document text
    • https://bogatogofaz.weebly.com/uploads/1/3/4/7/134705351/d37f5ee52.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/ajaFhhI/orange_tree_inn_santa_barbara_phone_number.pdfIn PDF document text
    • https://rajidorux.weebly.com/uploads/1/3/1/4/131453086/weduxuxegupulipejewa.pdfIn PDF document text
    • https://famipitep.weebly.com/uploads/1/3/4/3/134355151/96730229f0.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/e8b5914.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/098fd118-5062-4730-9c07-5fef32ef36ce/jukosew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12216b4c-8cca-414f-9d43-626e866fe37c/92927584578.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_off0000cdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB9 5164 bytes
SHA-256: c1ec011f87f89978574cc4a1c264674bcc919db4395199f0ee5cade695aaf094
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 11168 bytes
SHA-256: 7b3c7ea1998887130ad4a92c3ad2b3f95945354b636afb737f739315636f71c0

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