Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f233559e5f10074…

MALICIOUS

PDF

163.5 KB Created: 2020-11-26 01:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0dc92186c3ef007d036708f8afae29bd SHA-1: 9ec42d65c6a5d63ab787b22a6c73a15c5be04c2f SHA-256: 9f233559e5f10074191a8f1860fc01d88e2007d6a9eb1d51472cc32d0c269421
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to directions, suggesting a lure to trick users into clicking malicious links. The presence of numerous links on disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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/123?utm_term=directions+to+monroe+new+york In PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/9171143.pdfIn PDF document text
    • https://tapojofam.weebly.com/uploads/1/3/4/5/134518610/xiwivajeli.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/6ad7672d.pdfIn PDF document text
    • https://gogunijex.weebly.com/uploads/1/3/4/6/134679659/jamesataresa-xenebene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5fae3f01d6bdf.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/6508990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fa4c5c9ba4d6.pdfIn PDF document text
    • https://jabanomazekapuf.weebly.com/uploads/1/3/4/7/134743752/dizozaresokiboz.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/c6b24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f94764089cc9.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/06918566-5307-490d-8126-d15ca56a06ac/chemistry_a_molecular_approach_4th_edition_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/65-70_celsius_to_fahrenheit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08d04d3-fa59-43ba-9781-16afe2decda0/10_9c_time.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/77142098350.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/lafoparilo.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_off00024b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B93 4960 bytes
SHA-256: 3e168d1ec89e2266ebefddfcf94dfca5124d328d33deb6d07c14f479a76aecc8
font_01_sfnt_off00025c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C7F 10812 bytes
SHA-256: 259bb3fcadb3c2b2e00cf7f143b895a45a165e856ace87fad6499887ae4376c4

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