Malicious PDF — malware analysis report

Static analysis result for SHA-256 463ed8a585dc064a…

MALICIOUS

PDF

73.5 KB Created: 2020-12-30 14:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1d903ddf91778f59983f54cce6b8e1ab SHA-1: 8056e4fbda42817810a91116a07c4ab0ff2ffe02 SHA-256: 463ed8a585dc064af990b5acf4387e047f586d585ad8fb317a9203ee0a6b5ac9
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. One critical heuristic identified a link to a known malicious redirector, indicating a high likelihood of user redirection to harmful content.

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://ggtraff.ru/strik?utm_term=penalty+kick+soccer+rules In PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/2fb1c1cf7e39.pdfIn PDF document text
    • https://firizuvamo.weebly.com/uploads/1/3/4/6/134618899/636f2c05.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/danuzediw.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/ewohdjd/tip_top_barbers_colleyville.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/2b0660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405186/normal_5fd36aaa76529.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/jafitetelana.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/K7ljb0r/nuzumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fc98ac053e82.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/8507ba79-81bc-4013-b6c4-af2aba3f0668/minecraft_small_animal_statues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d811820-c2a9-413c-a64d-59469a0b9a5e/pdf2word_v1.4_registration_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8583bf7a-922a-414d-b259-862a669747a3/coin_master_hack_spins_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2305cc1-3a9d-431c-95c6-b53b49bc6240/download_hamba_by_the_q_twins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1374e15a-e8cb-481e-a1fc-de40fb47c32a/25660979551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf18cbc8-6bfb-4817-8058-4efd6118be3c/typing_attack_ultimate_typing_games._type_fighters.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_off0000e2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E9 4960 bytes
SHA-256: 826457eadc2e832f334a590e048e6ff7e5473a065511faae238564d763ca2597
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 11076 bytes
SHA-256: 5ebf1bea67cbe668494b9cbc23a4f5b139068b6ea58ab0973c477cfd037b39e0

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