Malicious PDF — malware analysis report

Static analysis result for SHA-256 72749c7710320269…

MALICIOUS

PDF

79.4 KB Created: 2021-03-02 23:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8906a41ec31507ec39e65a9eb54cd8b SHA-1: e0e35e5aedb865e22af39b023bf37bc5f7f79ba7 SHA-256: 72749c7710320269d06c591db1b538b6cf6d9f1aefe76669eb459afc33139b7f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered as a spearphishing attachment, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=where+is+stairway+to+heaven+nj
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/kuxomow_xulonur_levotaginobaz_xanatopaz.pdf
    • https://cdn.sqhk.co/jiwejujorod/RWxhV2D/51021346346.pdf
    • https://cdn.sqhk.co/mibemofega/4iaZjgo/35783277093.pdf
    • https://cdn.sqhk.co/jeporikate/ggizjjb/16569905998.pdf
    • http://kukushpa.fun/zujipisopozitebowinod8bt88.pdf
    • http://arboozfilm.com/is_shipping_in_cogsek01c.pdf
    • https://cdn-cms.f-static.net/uploads/4454052/normal_602613d133024.pdf
    • https://cdn.sqhk.co/wewidipo/cjdihhd/angie_s_list_apply.pdf
    • https://cdn.sqhk.co/wuzededoz/jeggifq/falling_water_falls_arkansas_camping.pdf
    • http://uablog.website/kusin5n6kw.pdf
    • https://cdn.sqhk.co/xitilesuxiw/gggfBig/realpolitik_game_wiki.pdf
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5ffff41feb583.pdf
    • https://static.s123-cdn-static.com/uploads/4480749/normal_5fec2a1f183d0.pdf
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/6031056.pdf
    • http://replyua.site/75957719735d77rm.pdf
    • https://cdn.sqhk.co/punipopi/niaY6gd/cross_stitch_pattern_maker.pdf
    • https://cdn-cms.f-static.net/uploads/4448986/normal_600a3ddec3eca.pdf
    • https://cdn.sqhk.co/rovifatira/hididFV/cinemark_brasilia_ingresso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jajuzasalikirut/7857367612.pdf
    • https://s3.amazonaws.com/bubisifapagefe/khan_academy_computer_programming_answer_key.pdf
    • https://s3.amazonaws.com/dozore/81741136366.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f995.bin
31c436f904bf546be95c6913b7f673974292c7bbc9ca78b34b097e1a19e26b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 5084 bytes
font_01_sfnt_off00010afc.bin
1fdeadb181c3b6ca6c48b22c69f55df23de18329c60332fa45794491a5809133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 10844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.