Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f038ddca4a32f1b…

MALICIOUS

PDF

71.9 KB Created: 2021-03-20 22:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 488c49d579f440096fb392fa75b19f47 SHA-1: 7c52727c57621914c72bbbc9e0e40daca5a5eecd SHA-256: 6f038ddca4a32f1b454665b5f75744ce936868b43d83edc8d7a442e3f5756bdb
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to generate traffic. It also contains an external URI pointing to a suspicious domain, likely for malicious redirection. The document body, though heavily obfuscated, suggests a lure related to game cheats, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=baldur%2527s+gate+dark+alliance+gba+gameshark+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fd266f3a365c.pdfIn PDF document text
    • http://igcopyrightverify.com/birth_of_date_formatwoyc1.pdfIn PDF document text
    • http://vorgazme.com/63518014706z40ri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485591/normal_600b47726defe.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/genedonapubefe/amy_macdonald_songs_free.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_e91de318bba44577ba07007bc9d9b580.pdf?index=trueIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_6f776c2f4eb04a089750d4adcb696521.pdf?index=trueIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_52ac6adf091c460a82cb6975674c0138.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b90996-d093-42b5-b2df-103680b97ee6/63996743445.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/star_spangled_banner_musical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/soundcloud_music_er_android.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/rufozitajuputedotiwo.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_6f950439a32e468d934c0ee0014fd6dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/apple_ipod_4th_generation_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375603e3-19ab-43ed-b6dc-1bf3bced1044/digibabeguw.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/new_york_travel_guide_free.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_56512529373745349affd6da0a8bf37b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bitilalurulipiwiji.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/new_kindergarten_teachers_guide_2018.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_off0000d9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DA 5640 bytes
SHA-256: 19662f768349956ada3f253c9b4f5dcee390ae30680952f701b15b392048916a
font_01_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 10936 bytes
SHA-256: 18a132ef5aa5cb77a1112f731af734ae6c703f139659ff8c8bc737dd2819b368

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