Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ac4dc4ee17679a…

MALICIOUS

PDF

62.8 KB Created: 2020-12-16 17:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 457fdce3f876c9243dfb25d794e0afad SHA-1: 9be0b55ab91e4564ec87341c257f391d60a16e7e SHA-256: f4ac4dc4ee17679abcdee07084c8f862e58254940364ffeb65db94a93954d439
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URI pointing to 'traffking.ru', which is flagged as a malicious link farm. This suggests the document is designed to redirect users to a potentially harmful website, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=32+oz+to+one+gallon PDF link annotation
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/22d87c1708b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375356/normal_5f8ef18019884.pdfIn PDF document text
    • https://vojufutevale.weebly.com/uploads/1/3/4/5/134521456/jatijegaboja-mekara-lapegukovixobet.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://bomosaxume.weebly.com/uploads/1/3/4/8/134892214/0ac76b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcc2e1d9ea69.pdfIn PDF document text
    • https://titobuvidotid.weebly.com/uploads/1/3/4/5/134598786/3667266.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/c0916505-dadd-4763-a899-44bd004d073b/lutomeboxituxusixape.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/subject_verb_agreement_worksheet_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8eea47-4935-4528-83e5-471626b5134c/dotemepesenuladonisinidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c8b0d9-d80b-41ec-8634-a4d5cf6a9395/56719993619.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d7b37848ba205d3ab541/t/5fd730f2b1c3f31c7a9c502c/1607938293684/six_sigma_sipoc_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/kogorerilipupobomuwome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061b98e2-52f8-4224-8d91-82dfa4c7ab62/zoxosikusubigupixafejiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2666fe22-6a4f-456b-933d-1ed2492d20a7/mountain_states_with_borders_on_foothills.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1939ac6d964583626ee44/t/5fc988579309303fb8281609/1607043161287/clash_royale_epic_cards_ranked.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_off0000b9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D0 4828 bytes
SHA-256: 93a34440bddaa13559d67af8722a3727a5bb7c552eed0eb5d946d0ddcd6e67a1
font_01_sfnt_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 10240 bytes
SHA-256: d3c6b3a880f274a5ab023839b1afb2796768a62ee383f9a36c83ab1fe449959b

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