Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f89d970869d309…

MALICIOUS

PDF

74.2 KB Created: 2021-03-01 12:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 241f9653822925747952451dde21765e SHA-1: 4b0708049b4725774feb295278d696085a2b7869 SHA-256: b5f89d970869d30917d0e7e56884e7fcfda05716235f6d10e86c453c092e63d9
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, references 'Guns of glory mod apk 5.14.5' and an external URI points to a URL that also mentions the game mod, suggesting a lure to a malicious site. The presence of embedded PDF objects and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/wix?keyword=guns+of+glory+mod+apk+5.14.5 PDF link annotation
    • https://cdn.sqhk.co/norifasil/ygfoicF/ckn_toys_car_hero_runs.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/47245135916.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/gbhhWjb/vilituzale.pdfIn PDF document text
    • https://cdn.sqhk.co/nojumuku/cihhbRJ/paradise_island_bahamas_vacation_rentals.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/virgil_aeneid_book_1_latin.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/5ibLgjC/music_tiles_3_ad.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/does_tomtom_charge_for_map_updates.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/aiahfie/cultural_diversity_meaning_in_tamil.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/kezemiradigu/1330983481.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/pijev.pdfIn PDF document text
    • http://lusiwavi.rf.gd/firufokaduwudawinuzafime.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/hitachi_washing_machine_australia_review.pdfIn PDF document text
    • http://pugatexekar.rf.gd/98939832514.pdfIn PDF document text
    • http://veluvuwipigunuw.rf.gd/xubejotobopigapi.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/nofodogef.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/4373624373.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/balettan_molalledi_karaoke.pdfIn PDF document text
    • http://sofikej.rf.gd/goganopudobid.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 5852 bytes
SHA-256: 391fb6a26f6d61a57c8b5d2abdde1ab3c0b8fc6cd40a5f5416b406926633c2b1
font_01_sfnt_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10184 bytes
SHA-256: 31d57ccc3757728ba0ec6c926b977c8a762d5c29b4713f346f595c829fdfdde5

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