Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8ca3cdafaff4e3…

MALICIOUS

PDF

79.4 KB Created: 2021-04-07 10:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ecf9e4db07d439a0b0e434212b501e0 SHA-1: b19f28aa00929f8345c9a8a8eef0f781e25ad939 SHA-256: 5e8ca3cdafaff4e36ee0d0e6511be52f764739d23302bc10ca39269e00386f04
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • 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 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://ponafet.ru/123?utm_term=fishbone+excel+template+free PDF link annotation
    • http://gogodolajukapob.22web.org/vujedazugupafukadafojive.pdfIn PDF document text
    • http://nojuror.22web.org/76935772258.pdfIn PDF document text
    • http://xuforixek.22web.org/can_you_eat_crawdads_from_a_creek.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/1238417061.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/79698609493.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/savetuselusib.pdfIn PDF document text
    • http://zijaditenup.getenjoyment.net/sets_math_grade_7_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/jenIuhj/arizona_shooting_fire_restrictions.pdfIn PDF document text
    • https://cdn.sqhk.co/revinoxu/ijpcSKn/the_happiness_planner_core_values.pdfIn PDF document text
    • http://fiwupejebibogu.sportsontheweb.net/dowry_system_in_bangladesh.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/attack_on_titan_season_3_explained_youtube.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
    • http://lojubefogugiku.onlinewebshop.net/peguzefasar.pdfIn PDF document text
    • http://danasavej.epizy.com/beloved_1998_movie.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/59184504119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3ef7ab-15a7-48a9-817a-21b77d557bb5/kolisiwekeloxuzamugup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632804aa-d7fb-4f28-a572-001d37800fde/32961259645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d110eef2-91dd-4205-8a82-e50b3742d860/who_will_play_jack_reacher_on_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9bc086-c45d-462b-a950-9a1bf220e463/how_many_gb_is_hearts_of_iron_4.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/how_to_program_a_1998_craftsman_garage_door_opener.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 5204 bytes
SHA-256: 05dbcdb0797620c03910be44c90cfad565bc6f98d93e2b2f4f24d81a59d79a91
font_01_sfnt_off0000f44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 11008 bytes
SHA-256: bc9f1304c0004dd97910b7db766764a2cb1824810ac9cd32b574b22242a04f43
font_03_sfnt_off00012201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12201 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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