Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eef08912bdfc5d6…

MALICIOUS

PDF

75.6 KB Created: 2021-06-02 18:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dd29a362b3872d1bb301d2a709bf91c8 SHA-1: 1044d32ea3d7216d8d302af357c329799b517c27 SHA-256: 1eef08912bdfc5d6147a0e144996e596fad17e30b7607979313fcff536231fc9
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/pbw?utm_term=download+onlyfans+videos+url PDF link annotation
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/gelizuwotur.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/5044cdff7a90161.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/wifat_rudijexina.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/98f1e1af-cd0e-40ac-a394-fc4144e1264f/ill_see_you_in_my_dreams_keegan_dewitt_ukulele_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0967838f-89c8-4da6-a961-bfc9ec3de567/pesafes.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/22603474612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2da4b6-7dfc-418b-aceb-613b4d33aaf1/what_are_the_4_types_of_curriculum.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/f/faceapp_full_version_free_apk.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/f/17544105218.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144423648/61272907969.pdfIn PDF document text
    • http://risoxef.pbworks.com/w/file/fetch/144478749/focus_on_life_science_7th_grade_textbook_online.pdfIn PDF document text
    • http://figuduvimeti.pbworks.com/w/file/fetch/144515262/dil_tenu_kina_karda_pyar_mp3_song_download_songs.pk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dedd86e7-ddf0-41e1-bc81-cbe93eab031c/78762501617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f839f6-c4b2-437d-8daf-e6007b37451b/34622654552.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144505956/five_goals_of_the_criminal_justice_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3d3cbc-2c08-4747-ac8e-b511d7bcb419/pivujimewukogorumapo.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/f/husqvarna_riding_mower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2187cc-02cc-48dc-89da-22646c124d60/6760918291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661fb420-65b9-4835-aac2-266d00570eba/nunotanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c950e0a1-3444-4382-b824-c84a0c0fff45/john_fante_ask_the_dust_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd64b7fc-aa0d-480d-be58-f20ab7f3834f/what_does_queen_mab_symbolize_in_romeo_and_juliet.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/twilight_saga_part_3_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/w/file/fetch/144516240/nova_what_darwin_never_knew_video_questions_answer_key.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_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 5152 bytes
SHA-256: 7cc64ffb8e43af2d7c8fc4de3aa5e8d792dbea4608c020e5f78e7b052e6642d6
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 10472 bytes
SHA-256: 4d8e95ff458130b41f9122e84a4ae0cb182cf1fd3ded07aa877775d980ae939e