Malicious PDF — malware analysis report

Static analysis result for SHA-256 b035b421d785c4eb…

MALICIOUS

PDF

78.0 KB Created: 2021-01-18 14:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6974e0c7a7209ab794678de1bbab8452 SHA-1: 294742fe346fe3a10299fee4d75361a4bbd74b48 SHA-256: b035b421d785c4ebf2de8169c661c57a0bb167c4b800a14cd1a0f4cb81178973
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, suggesting it is part of a link farm designed to redirect users to potentially malicious websites or for SEO manipulation. The presence of numerous external URIs and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://trafffe.ru/123?utm_term=the+36+hour+day+review PDF link annotation
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/zuzewobabavur-pojudifuvaluxo.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/UjdP8kN/color_bump_casual_game_levels.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/1wLyojN/pomojafajorom.pdfIn PDF document text
    • https://site-1174461.mozfiles.com/files/1174461/rome_business_game_2019.pdfIn PDF document text
    • https://site-1171534.mozfiles.com/files/1171534/ranavigegaravevajovus.pdfIn PDF document text
    • https://letenusesek.weebly.com/uploads/1/3/4/3/134310332/xegidito.pdfIn PDF document text
    • https://site-1178710.mozfiles.com/files/1178710/voropozezedafafutegoxo.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/xujewonagamaxu.pdfIn PDF document text
    • https://fafogefefotal.weebly.com/uploads/1/3/5/3/135314601/5827a.pdfIn PDF document text
    • https://xuxavapivobe.weebly.com/uploads/1/3/4/5/134590147/tepesozemog_wuxov_mujebosajijeri.pdfIn PDF document text
    • https://wiwajefe.weebly.com/uploads/1/3/4/6/134676348/8594a933.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/BkIhbhb/75179943188.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/27e7f7844c.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/4I8SgeO/is_86_bit_better_than_64.pdfIn PDF document text
    • https://bolifalaloken.weebly.com/uploads/1/3/1/4/131438202/dubobax.pdfIn PDF document text
    • https://site-1176481.mozfiles.com/files/1176481/rumble_on_roku.pdfIn PDF document text
    • https://site-1177444.mozfiles.com/files/1177444/auto_clicker_for_roblox_android.pdfIn PDF document text
    • https://site-1180682.mozfiles.com/files/1180682/coupons_for_mcdonalds.pdfIn PDF document text
    • https://pumewuku.weebly.com/uploads/1/3/4/6/134638235/5067567.pdfIn PDF document text
    • https://site-1234129.mozfiles.com/files/1234129/betty_boop_remix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vonusirukete/vivaldi_summer_presto.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/28490380957.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 4920 bytes
SHA-256: 5ce7ecef4293d1d0658a4b73d1532035c706120e5b0fe9f5f43ab7eb0933b4e1
font_01_sfnt_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 10612 bytes
SHA-256: ca8ee1219787537cf72a5f89374d1b33c49e84eb8ca929fa86bae1f3c31925bd
font_02_sfnt_off00011cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3