Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85ee936aafb0623…

MALICIOUS

PDF

78.2 KB Created: 2020-12-25 20:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9f5c2df846ede409fad9095142736467 SHA-1: ec25af21ed99ffe14f224ef1ec4cbe80faf47267 SHA-256: f85ee936aafb0623e965f6705ac108ea7bba953781e11c59ebf6f44a74a61056
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple unknown URLs strongly suggest a malicious intent to redirect users. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing lure for game hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/aws?utm_term=asphalt+xtreme+rally+racing+hack+mod+apk PDF link annotation
    • https://wibiwiterudek.weebly.com/uploads/1/3/4/3/134373050/lililemixupepuwemiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rurewemanavi/gjwjfzf/wosisaxefusukutekav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8b999e6d5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5fd0f6bba89d7.pdfIn PDF document text
    • https://daxapiruxibi.weebly.com/uploads/1/3/2/7/132712323/2457258.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/vanatul/hyrule_warriors_adventure_mode_guide_wii_u.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/rca_video_y_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/sagiwukanujokemar.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/bteup_marksheet_verification_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/assault_android_cactus_medulla.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/39550824706.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_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 3120 bytes
SHA-256: 4925a81319bbd9efa0dcb9b7c66fccd1fd8c2b9f5e9916edfa1d670e4d491518
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 5708 bytes
SHA-256: d57fa675ee4b3af6ddc3deb11aff182214ab0169ca3cc8cfd86cde7eac92315c
font_02_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 14240 bytes
SHA-256: f6ddeb99bc44dbf21fc4856bc4c9a30a25aab742fb97ad730fcb01d3614f789b

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