Malicious PDF — malware analysis report

Static analysis result for SHA-256 1367124f1b7213ce…

MALICIOUS

PDF

58.6 KB Created: 2020-11-24 20:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5fad66d7e7951c5e9c32dbf16ad787da SHA-1: 4b13f6340f6d659102ad834f6c5742b31bc886d0 SHA-256: 1367124f1b7213ce9738b63510e6cb16e83492acfafe8f4ac8788617b43a270e
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 an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of embedded URLs, many pointing to disposable hosting services and some redirecting to known malicious infrastructure. This suggests the primary purpose is to act as a link farm or redirector, likely for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cctraff.ru/strik?utm_term=crying+heart+tattoo+outline In PDF document text
    • https://vurozagagi.weebly.com/uploads/1/3/4/6/134695821/39eeda481168.pdfIn PDF document text
    • https://kevuwegifutawed.weebly.com/uploads/1/3/4/7/134746568/0640d88d9344.pdfIn PDF document text
    • https://xavedogaw.weebly.com/uploads/1/3/4/6/134659805/23dd000e58e.pdfIn PDF document text
    • https://silosapa.weebly.com/uploads/1/3/4/5/134580216/rejas.pdfIn PDF document text
    • https://kirugivedipabaw.weebly.com/uploads/1/3/4/4/134464293/bukoku.pdfIn PDF document text
    • https://mufixedak.weebly.com/uploads/1/3/4/6/134602267/8635812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9cd8cc545db.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/rirumaweranopiveloko.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/bejeseja/reading_and_writing_decimals_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/reading_comprehension_inference_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9D 4776 bytes
SHA-256: 1cb7ca4ea2a14760d5fa7d38b039dd9e205a08e08f3bdbedc627c4bf01db76cb
font_01_sfnt_off0000bed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED9 9008 bytes
SHA-256: 633bd307ba22285a21d29816103496c441a6e69c0e780d2855898e774b9a1542

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