Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1abf3fb03528e92…

MALICIOUS

PDF

85.7 KB Created: 2021-04-23 04:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d7631270054efb8ff21c6de0b04d26b SHA-1: c70741fa34e6193454220b4e8c427ab54f50b497 SHA-256: c1abf3fb03528e92988e0a5bdf2ecb9b403cd861c2055ae927be84758941a4ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://kuzutuzo.ru/strik?utm_term=grim+dawn+forgotten+gods+maphack PDF link annotation
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/tisijenidajo.pdfIn PDF document text
    • http://meetplafond.xyz/nomunadaji36yhj.pdfIn PDF document text
    • https://cdn.sqhk.co/mezewimaxus/hed9x4W/classic_mobile_tone_ringtones.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/mulaxorej.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/kDEicvU/beduniguwakedimupotidaw.pdfIn PDF document text
    • http://shoop-fr.ru/33292904954w8z7y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454304/normal_6023b92655fd6.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/9327820.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/omhhgg2/bisafofejebimusod.pdfIn PDF document text
    • http://italystore.pro/zapujosazuvulerikoxiwiv8236g.pdfIn PDF document text
    • http://yandex-delivery.cc/us_military_phonetic_alphabet_chartjspkn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_606987e2b1f80.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/7671596.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/kanabol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_601c9cd1e7a2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff219e880b45.pdfIn PDF document text
    • http://mattelipsticks.site/72990508192xtw87.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/jalasilunaz/3129405601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f96a239-6ed9-45d8-91a8-1a6b32869777/28116179347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4ad057-f630-4b17-9076-069d319ef07f/windows_server_2012_support_tls_1.2.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/patilulevelipafem.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/6th_grade_math_books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5965d8d-2d88-4c1f-a033-83b7f90e6820/bose_acoustimass_10_series_ii_review.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/xubasagimevakiburumosite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ab3ed1-c5ad-401a-92f8-ee6025b6911a/zadowanarineg.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/85008906607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db4e7e7-67d1-42cf-be2d-d0ae1aab6f18/hp_officejet_pro_8500_not_printing_all_colors.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_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 5752 bytes
SHA-256: 64bcca7cec055ea7966ed088d6d432386d6afc27f430b481638f571a2d7a40c6
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 5724 bytes
SHA-256: e4935b195e961bff4a77d67bc2963ac83df2a71a8bf868e9335652fe1053b09a
font_02_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 10984 bytes
SHA-256: a3b08d7a78f0cbb8c13ffd77d1499ec3e7418173e26be1fd36842c345ce65072