Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9c80f8c30a2f70…

MALICIOUS

PDF

69.9 KB Created: 2021-03-14 20:08:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6f40fd9a5bec6193710a635f9796209c SHA-1: 5cf1a27a4acfe50003905a33c1b9f6fde7d4d994 SHA-256: ed9c80f8c30a2f708a789c0950848cfc05a7facd18391423f2fb7174cbacfccf
196 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which point to other PDF files, suggesting a link farm designed to host malicious content. The presence of a LOLBin token sequence and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://bologen.ru/wix?keyword=cover+fire+apk+download+uptodown PDF link annotation
    • https://cdn.sqhk.co/fafovewidom/khbgihe/lemirifaxesarafuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/salaseli/XwThAjd/formal_updos_for_long_curly_hair.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/bb13bd1b.pdfIn macro / runtime command snippet
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/2257349.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/WZnWAUP/kurir.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/10kgf9E/download_game_hollywood_u_rising_star_mod_apk.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/rarozola_dopixuma_lipez.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/Yggunha/tag_with_ryan_combo_panda_code.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/dEVherm/disney_getaway_blast_disney_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/cidjauJ/jemagovunasoluvibademusev.pdfIn PDF document text
    • https://xajomorunineg.weebly.com/uploads/1/3/1/3/131383441/7ebaf0b81d554.pdfIn PDF document text
    • https://cdn.sqhk.co/lozukoxokir/hhgiihr/wingsuit_proximity_flying_death_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/derixosu/e4jathd/drive_ahead_sports_mod_apk_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1416a27a-814f-4b30-8501-75043c27beac/hisense_air_conditioner_window_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062f1d84-02f7-46d8-a9e1-3ada18a60d68/22445716025.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/chapter_3_lord_of_the_flies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdae803-05a0-43eb-9e0e-17ec5935faf3/45577083956.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/dd_rules_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7fbd5b-897c-4f12-99ab-208810d2ed10/mopitexibanomovojiwewule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0719bf8-a577-401d-9b4a-ec217d1dbcc7/red_burning_rash_on_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b3b5e2-94b4-42f6-968b-44d8da12919f/51624271686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ed9291b-2c9b-4820-b35d-dc714f578c4e/70793420521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d8b840d-f404-4181-8b5a-4ad69096f0d4/stairway_to_heaven_korean_drama_episode_13.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/56941669954.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
    • https://uploads.strikinglycdn.com/files/1416aIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 4980 bytes
SHA-256: 8b7013f150e9274d13db634d2f15168a4c6c2254cf5becf5985c01dc76d24797
font_01_sfnt_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 11140 bytes
SHA-256: 23d99fba8f53997d0a2d4e9c0d438c39a41632bd0e0090aaa65ad3c65fe05419