Malicious PDF — malware analysis report

Static analysis result for SHA-256 c694bb42c5841c9e…

MALICIOUS

PDF

77.0 KB Created: 2020-11-13 08:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 328e64f6addb370040368a479c1f1e78 SHA-1: 9e431124fd0b524c8ec8e221147d330bdb5afc8b SHA-256: c694bb42c5841c9e0eca10a9b932cf7c56372061717a5c86463e1b2f5405e73f
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including one pointing to 'traffnew.ru' which is likely a landing page for malware or phishing content. The presence of a 'download button' heuristic further suggests a lure to download unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/123?utm_term=traffic+rider+hack+mod+apk+unlimited+money+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f9cafdec3cbb.pdfIn PDF document text
    • https://lugesivewamaxiz.weebly.com/uploads/1/3/4/5/134596289/e22b65949.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/064fc2c83b3f28.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/dojopojij-sewikururi-mitimis-togofiwod.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://taxepenobeg.weebly.com/uploads/1/3/4/3/134355702/fidulerego.pdfIn PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/5807934.pdfIn PDF document text
    • https://jujijojof.weebly.com/uploads/1/3/4/3/134353579/xovafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/forensic_science_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f124a90-38b8-40c1-bccf-2cabce621d45/psiphon_82_apk_handler.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/84101465523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1e8965-da61-4c8f-a5e5-9e5c8bfc1ad7/15359558838.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 5304 bytes
SHA-256: 527d242733e92ed745cf246d1d6d089f85058e951b37cf8a830370aa8394ec92
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 10848 bytes
SHA-256: f275071e20aab920abbc7828ad807591e5f4476622d1e62d1d638d83b069c602
font_02_sfnt_off00011908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11908 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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