Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4fa258184d3258…

MALICIOUS

PDF

86.9 KB Created: 2021-02-14 08:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1018ad8be3e36695b83a2b4fbc7a2685 SHA-1: 375f4f88f1c67c7fc6e8767874655b931c3723f2 SHA-256: 5b4fa258184d32586a342a5aa21dec208c8f90668cf442d4c06d56b5cbc00fbf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, and the PDF_URI points to a URL that appears to be a lure for a service manual. While no scripts were explicitly extracted, the presence of many external URLs and the ML classification strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://leonvi.ru/wix?keyword=2005+volvo+xc90+service+manual PDF link annotation
    • https://cdn.sqhk.co/guwuweri/sTFbjdx/small_business_accounting_courses_online.pdfIn PDF document text
    • http://fortysgjdk.fun/rap_reality_tv_showscl7cu.pdfIn PDF document text
    • http://wisitens.online/34295841450utca7.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/chejdib/85247726406.pdfIn PDF document text
    • https://lokawinopigu.weebly.com/uploads/1/3/2/7/132712062/vetewet_bejewolegu_bujoketodipax.pdfIn PDF document text
    • http://ifeelgood.club/gunship_battle_helicopter_3d_unlimited_money_gold_apkek2k5.pdfIn PDF document text
    • http://naturmilans.fun/rokifuvozigonole7ejkc.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/JTjfQYI/99936082585.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/8Oa8bjc/ludo_star_pc_version_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/burger_king_coupons_2019_mai.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/xasugizut.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/76920725452.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/26083837310.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/40497428973.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/ribulikedumapar.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/3505125620.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/bootstrap_simple_template_code.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 5532 bytes
SHA-256: 97942f8a2c166b7be991505122d825af24c73eb6256d3fb53843f84208e31011
font_01_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 15640 bytes
SHA-256: 1ca1df7b3bcb291e5d2d9cdc649351b8a955813cb736a93280ade0644848a0e3
font_02_sfnt_off000138b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B6 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

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