Malicious PDF — malware analysis report

Static analysis result for SHA-256 4677fa99090572ae…

MALICIOUS

PDF

92.7 KB Created: 2021-03-15 11:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7506d36e504805bf3c3e8d9b27491158 SHA-1: 613119aed58568ccedf869ca1cd962ea6d570f93 SHA-256: 4677fa99090572ae0e0f71a726842e6dbf86c85a04f0da21ac4bb08d482b90a5
176 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a large number of embedded external links, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to 'macros' and 'hunter', potentially luring users into enabling content or clicking links under a false pretense. No scripts were extracted, but the PDF structure itself is used to host numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://jacksth.ru/wix?keyword=vanilla+wow+macros+hunter
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/gexepefakaxageb.pdf
    • http://dosaxixapaxa.medianewsonline.com/41222162415.pdf
    • https://cdn-cms.f-static.net/uploads/4380382/normal_602b0b3fcf79f.pdf
    • https://cdn-cms.f-static.net/uploads/4494888/normal_603429d11c688.pdf
    • https://cdn.sqhk.co/rowojazur/To6jaXp/mercantile_capitalism_simple_definition.pdf
    • https://wavasifowimuzog.weebly.com/uploads/1/3/5/3/135321241/9ed00.pdf
    • https://cdn.sqhk.co/juvokapo/HcqI5id/funny_loose_motion_gif.pdf
    • https://cdn.sqhk.co/zegofurop/Pj04hde/build_a_bear_prices_near_me.pdf
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/sikulagutamu.pdf
    • https://cdn.sqhk.co/wosepimi/hgfjdrk/38575948363.pdf
    • https://duzezefoge.weebly.com/uploads/1/3/1/4/131437668/9693371.pdf
    • http://xezixaz.getenjoyment.net/general_biochemistry_mcqs.pdf
    • http://puwuditufu.22web.org/11420048829.pdf
    • http://winoxolupuvil.getenjoyment.net/beats_solo_wireless_2_price.pdf
    • https://cdn.sqhk.co/liripudeb/eLrShhi/xaxifinik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kosezofejesuxef.atwebpages.com/bilangan_rasional_dan_sifat_sifatnya.pdf
    • http://zopefunexot.epizy.com/91058199639.pdf
    • http://jomusosufetobox.rf.gd/game_maker_studio_1.4_license_key_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f70e.bin
a50facd5471dcb78dd510a8d0052c3ab85f471aa657dbff7542e961cc6ed2a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 16892 bytes
font_01_sfnt_off00012997.bin
70f9bc727c2c1d3d670d64e4268ddc90a073eb7659a2f09bdc5f864e98938fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12997 5096 bytes
font_02_sfnt_off00013ad3.bin
65612838ab87863bd3dd4320701945a7f07dc94eb24fe7b4e5f66c794799b55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD3 11828 bytes

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