Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0328585d6bc252…

MALICIOUS

PDF

81.0 KB Created: 2021-03-20 05:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6b2491b2ab5034512804602793fc0b8f SHA-1: 8759cef06ac3b95258466ef0b0af441581d03a08 SHA-256: 6a0328585d6bc25225a6262937e9c95ca58b3098884e1aa73c9cca15a305d102
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the PDF structure suggest a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of numerous external links indicates an attempt to lead the user away from the document to a secondary malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=how+to+change+input+on+old+rca+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377697/normal_60172a3758b03.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/eusicie/non_infectious_diseases_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/tUPmght/swag_hd_wallpaper_1920x1080_download.pdfIn PDF document text
    • https://jubigugatuse.weebly.com/uploads/1/3/0/7/130775741/mofafomaki-rixiwajokixom-kizagi-xunoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/hiY6EJA/chess_online_with_friends_unblocked.pdfIn PDF document text
    • https://gevupuwelado.weebly.com/uploads/1/3/4/8/134894118/55ec1ba1.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/igPhjhb/nekex.pdfIn PDF document text
    • http://mamimufexaliro.66ghz.com/gta_san_andreas_mod_apk_aptoide.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/nusowenoponiboro.pdfIn PDF document text
    • http://xufaroruguvotel.iblogger.org/nagumugajoletawopotomova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470040/normal_5fcf9f4d130bc.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/gePbhbb/47237107728.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_5fe52d187239c.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ihibjbu/mortal_kombat_11_character_tower_unlocks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_6055470c85a63.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/hg1rhcW/beach_buggy_blitz_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_6046b1b17156c.pdfIn PDF document text
    • http://kokulet.22web.org/gimp_alpha_channel_vs_layer_mask.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_600dc3955ff8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465277/normal_6050f7d4f06a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5ff2e3a4806b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 5272 bytes
SHA-256: a373466e0441a57a25135a07298393f79aec5af241a5bd1ec1f7340db0195480
font_02_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 11024 bytes
SHA-256: 7af03009f16289618daefe9d1f59d72fa7dd01ce5747cf7a3e46e315b3f1c1fe

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