Malicious PDF — malware analysis report

Static analysis result for SHA-256 601a6e8c08e5367c…

MALICIOUS

PDF

82.2 KB Created: 2021-03-22 11:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b2b9d61062c2534d63610d9b026d59bb SHA-1: d613d14401f5310ab5c75d8814b6a48962a7d8a6 SHA-256: 601a6e8c08e5367c0c29f0bbf6ffa5fd4cb3c831d7a096c081028d5bfe44ea1c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation, likely to host malicious content or phishing pages. The presence of external URIs and the overall detection as a phishing trojan strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fokemale.ru/strik?utm_term=dewalt+dwe7480+parts+list PDF link annotation
    • http://bevamifugidujew.scienceontheweb.net/10th_quarterly_exam_portion_2020.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/accounting_manager_resume.pdfIn PDF document text
    • http://subfamjtii.site/51271619809pbv4y.pdfIn PDF document text
    • http://astropsychology.site/introduction_to_trigonometry_ppt_downloaddl2om.pdfIn PDF document text
    • http://idealica-uficialeitalia.website/bi_weekly_work_schedule_templatenw0ub.pdfIn PDF document text
    • http://rcasino.info/87689013913xlaoz.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/chromosomal_defects.pdfIn PDF document text
    • http://slimitalia.space/equate_eq_cool_mist_humidifier_instrlg9wp.pdfIn PDF document text
    • http://4338bacchus.com/abcd_movie_all_song_320kbps6jjhe.pdfIn PDF document text
    • http://eferevole.com/704068962473m1ac.pdfIn PDF document text
    • http://fesilax.22web.org/how_to_get_a_land_grant_in_texas.pdfIn PDF document text
    • http://axecheat6.xyz/95330811353yb0nc.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/waxenugupek.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/navaniniradeguxizebagas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a277e4fe9cf24c4b959a2caa4d6e2544.pdf?index=trueIn PDF document text
    • http://xotexipu.rf.gd/annexure_viii_form.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0d7f32f97abb434383929c2fee3aa4e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbc723b-188f-4f0f-990b-6c629cc49127/firuwek.pdfIn PDF document text
    • http://dajatumuba.epizy.com/sharh_aqeedah_tahawiyyah.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_89db3b3af334460e80a0dd0466e89f50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fad4d02-d73d-4616-9ab9-216459b3a0cd/sharepoint_2013_tutorial_microsoft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679bbce0-a79c-4a1f-972e-964bd4a400f9/reading_strategies_for_kids.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_aa4dc413b399481d9c96c4ff2543a894.pdf?index=trueIn PDF document text
    • http://mogazijanadoro.rf.gd/logo_quiz_answers_level_3_logo_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16ebfb6-c3d0-4b4e-b292-68aaaafc15bd/barekavirevafil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2abcdc2-02aa-494c-ab82-8f2699abf6ec/chronological_bible_reading_plan_90_days.pdfIn PDF document text
    • http://widafasamuj.epizy.com/fill_in_the_gaps_exercises_with_answers.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_off0001053c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 5548 bytes
SHA-256: 9d7e877a8a410e10af4b535a47ebbe16af6a84e159eb45e127d2d756f0c02a10
font_01_sfnt_off0001184f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184F 10184 bytes
SHA-256: cd4a9b23289f759cfd0e51c173fdec0002c1a6805a3035b5fadb78a08babb5c9