Malicious PDF — malware analysis report

Static analysis result for SHA-256 761f8083cac1d740…

MALICIOUS

PDF

129.9 KB Created: 2021-01-03 02:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d5af4453ba50da446397d13548f2535 SHA-1: 7b3d09f22ade60f4ce7032dcd49d65b3fa9ab203 SHA-256: 761f8083cac1d74095f502f20b3d07cdc6ae8862d5d81a569135f5c673e11c9d
164 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'World of Warcraft' and exhibits characteristics of a link farm, with numerous external URLs embedded within it. The presence of a critical heuristic firing for 'PDF_SEO_LINK_FARM' and a high ML score strongly suggests malicious intent, likely for SEO manipulation or to redirect users to phishing or malware sites. ClamAV also detected it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffking.ru/123?utm_term=wow+scroll+of+resurrection+bfa
    • https://cdn.sqhk.co/julukimesof/JxQ7Fjg/71534527715.pdf
    • https://cdn.sqhk.co/rizakumer/uhdlDjg/75455221302.pdf
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5fe7d93c7bdf6.pdf
    • https://pupizotewijuguw.weebly.com/uploads/1/3/0/7/130775862/88c05d7cbadb4.pdf
    • https://static.s123-cdn-static.com/uploads/4457008/normal_5fce07b23e562.pdf
    • https://pamopalosi.weebly.com/uploads/1/3/4/8/134857187/55deb437ea.pdf
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5f9696f10db1c.pdf
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f9819c04d2f3.pdf
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f8fd35fad325.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/53c29646-903c-4246-aa32-f215f79f6cb6/tasifimubi.pdf
    • https://uploads.strikinglycdn.com/files/66a674c0-6724-4434-9ded-e2ec2cff9f4e/18813352391.pdf
    • https://uploads.strikinglycdn.com/files/8b58c92b-38f5-43c8-9dee-bb5770a70118/45996479975.pdf
    • https://uploads.strikinglycdn.com/files/ba505874-164b-4e0c-9553-8594603f7343/traktor_2_download_free_full.pdf
    • https://uploads.strikinglycdn.com/files/023dd72a-b834-460f-ad7a-ccdca51ea2b2/see_aggression_do_aggression_summary.pdf
    • https://uploads.strikinglycdn.com/files/ab008463-1c04-4aff-8039-83d0059691e2/pokemon_glazed_pokemon_movesets.pdf
    • https://uploads.strikinglycdn.com/files/025009c8-0e31-485c-b937-f3793c3aae79/wusojimidoniseg.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000174c7.bin
34d690a377a31dd722e378c846f7d041fcc6ffd9a429fda68a99f63c9aa1e5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x174C7 13756 bytes
font_01_sfnt_off0001a232.bin
96db6dc7aea59504e28e34b95d4018dbd8822f3d629373eb77abfc979b7d4d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A232 5120 bytes
font_02_sfnt_off0001b3c8.bin
ab389fd62917998103db675da53f68982ec2cbdc95b98208aaf30247618428f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3C8 13372 bytes
font_03_sfnt_off0001e08e.bin
58949c899226d10f1d786b23411e7f10f21f2d15fb84939610e0c2f4b09c8a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E08E 17064 bytes

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