Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b9fadb30a2cb18…

MALICIOUS

PDF

92.9 KB Created: 2021-05-01 16:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2f57ce2b8420f917fbd3315724f6a60a SHA-1: 74e939a6fb12b9dad95439df65089fb5c1d9b3f4 SHA-256: 39b9fadb30a2cb18773489905af895535070b4b2c0cec879853c94be707f7c9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=ryobi+ss26+weed+eater+air+filter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fe1f726f11ac.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderimi/dDjbgh9/catfish_meaning_slang.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/j4KwVhG/guardian_tales_lazy_fairy.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/how_to_make_textual_analysis_in_visual_paradigm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6012dd24b3e24.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/firupanipumajatuji.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/66717168674.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_5ffea42398527.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/P2fhfZP/sezejaxitimepid.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwavewo/eYhdfgg/musavosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501794/normal_6045038daa112.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/bw8geDm/didatimirapawetumefiti.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/hBjcVic/44168655020.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/ibzicGL/cartoon_video_editor_apkpure.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/41039163708.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fcc99e85fee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fd642f628170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450356/normal_6055001d39ed5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://romepasuv.myartsonline.com/96048723553.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/chemistry_textbook_class_12_hsc.pdfIn PDF document text
    • http://nizofikunatafu.atwebpages.com/le_bouddhisme.pdfIn PDF document text
    • http://feferabi.atwebpages.com/edexcel_functional_skills_maths_level_2.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_off00012827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12827 5528 bytes
SHA-256: af15e2e02c1abf6a4b17f4e2da5ad5debd1d9997b4bba3abfeed973465a3f18d
font_01_sfnt_off00013b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1F 13780 bytes
SHA-256: b804ca5de969829b51f8ee685d8a142734a71c2e1b954cbc681a3ee18eb94499

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