Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfae856a201dea3a…

MALICIOUS

PDF

194.0 KB Created: 2021-03-23 21:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 18a0ce25efc64dd2b9b2b863241083d8 SHA-1: aba336a2fc7b14cc618ed1e2f506c1f3cbe1e73f SHA-256: bfae856a201dea3ad9101f500e4e892d51031e8e4259752b6a7a599a97e7db54
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains keywords related to a game guide, suggesting a lure to entice users. The presence of numerous external URIs, many hosted on disposable domains, further supports the malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=clash+of+kings+guide+2020 PDF link annotation
    • https://cdn.sqhk.co/xudadidi/Vpjd3ih/motogp_2020_results_wikipedia.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/hbvgchg/jomigasirugiluk.pdfIn PDF document text
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/3425613.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/articles_on_higher_education_in_pakistan.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/8738335.pdfIn PDF document text
    • https://niwarixetawozav.weebly.com/uploads/1/3/4/1/134108921/redejin-govikoxavux.pdfIn PDF document text
    • https://bejelasinodajib.weebly.com/uploads/1/3/4/7/134764461/3790227.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/igdCeNC/labirinto_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/pexudolifa/54WZjiJ/fruit_ninja_online_poki.pdfIn PDF document text
    • http://purubeta.iblogger.org/19651002563.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/PjfjidS/7373813447.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/najabo.pdfIn PDF document text
    • http://weridif.medianewsonline.com/96421097122.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/tanikanaw/how_do_you_weigh_yourself_on_a_doctors_scale.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_5fd57d3ba55e47228d06f0e3cb54bf61.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_82809723c3b643db974072b5e54de9a1.pdf?index=trueIn PDF document text
    • http://pidodexogejax.myartsonline.com/us_army_flag_patch_upside_down.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/think_and_grow_rich_by_napoleon_hill_original_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/autocad_2017_vba_enabler.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/80617452482.pdfIn PDF document text
    • http://bufiwebejavika.epizy.com/vimuzoxoj.pdfIn PDF document text
    • http://jabuzom.epizy.com/tijenotavedejezevuz.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/best_khasi_love_song_video.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_off0002c0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0F4 5316 bytes
SHA-256: d47c0ba2c741c9f51d4b87c4da3f9adc5060236a71f6785bbf2f593e2f45ae2f
font_01_sfnt_off0002d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D30B 10884 bytes
SHA-256: ec880bae8213c335ae7370a3917d8b54fbcf54cf1e946c369a95c1a8381d9d1b

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