Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff37878024dd895…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 21:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9546c789d693435f1bee79ade7bcf4d2 SHA-1: 4a91395ea27b21ec87bf34a21e501d4df7580175 SHA-256: 7ff37878024dd8951b754d9e38c10995112dd5c8ae606a3f266c91d5d36e2ca9
156 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Gta 5 xbox one redeem code free' and embeds multiple external URLs, some of which are flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs suggest a phishing or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://druttle.ru/wix?keyword=gta+5+xbox+one+redeem+code+free
    • https://cdn.sqhk.co/fulaxanew/iczgfhb/76191764098.pdf
    • http://instacopyrighthelpteam.com/395203152738yg4l.pdf
    • https://cdn.sqhk.co/regavebike/g43gdge/kokitam.pdf
    • http://verification-help.com/rekiduvntx.pdf
    • http://santand-es.com/vufulej7jh4.pdf
    • https://cdn.sqhk.co/zedozomi/dyuigib/lopugeferarolikunujo.pdf
    • https://cdn.sqhk.co/rujiwujik/hhdDgBe/537117279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/somisilegex/relitabuji.pdf
    • https://uploads.strikinglycdn.com/files/1bc0b7c3-29ea-40de-bea8-1417f26a5295/the_book_of_unknown_americans.pdf
    • https://s3.amazonaws.com/polojuliragam/maboroxoda.pdf
    • https://s3.amazonaws.com/rotowan/lyerla_sheet_metal_heating_air_conditioning.pdf
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_43c2e97080bd4b708af045e49fb326f0.pdf?index=true
    • https://s3.amazonaws.com/gorajikunobixi/lefodukugederuz.pdf
    • https://uploads.strikinglycdn.com/files/49287390-f256-4ee0-a0b4-3cc0ad262cc5/what_is_the_best_workout_plan_app.pdf
    • https://s3.amazonaws.com/zatasipezeg/alimentos_altos_en_vitamina_c.pdf
    • https://s3.amazonaws.com/padosumifubobo/zejavavodok.pdf
    • https://s3.amazonaws.com/jevelel/61685089047.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/jitimivuzogijet.pdf
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_5d066acfac684b54a225776064685bc1.pdf?index=true
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_563413cdc10447559fb2f830f3587f7d.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3a.bin
e217f17b6c1bece9dc882e65d4424285d378b618f1b1e06a572be134b19fb63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 5320 bytes
font_01_sfnt_off0001014a.bin
4d14ef06987d99f532f54077216d0b862710080a31c944821b13e6d5e1de5f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014A 10840 bytes

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