Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ec6c7c2722fd01…

MALICIOUS

PDF

84.0 KB Created: 2021-03-07 09:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f44ecd53afdcba01be749577e8e6ffa3 SHA-1: d5949f7a37dd3beb432e34a72469b73978ddf1bb SHA-256: c0ec6c7c2722fd01ef306929eddfbdca45ff8acb214fd97debc8c147dd178651
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristic firings indicating it is a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains text related to downloading a ZIP file, aligning with a lure for malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://jumiwimov.ru/strik?utm_term=fifty+shades+of+darker+all+songs+download+zip+file PDF link annotation
    • https://cdn.sqhk.co/bapuparit/jeicggW/conquest_of_bread_pages.pdfIn PDF document text
    • http://gekalam.22web.org/statistical_learning_using_r.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/0ijiaha/fogefaxidulutejebu.pdfIn PDF document text
    • https://bopovajo.weebly.com/uploads/1/3/5/9/135966354/nagumi.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/fdW54li/forteller_forgotten_circles.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/jilegarasepigew_saxejumixid.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/NjUBhba/minecraft_free_to_play_on_computer.pdfIn PDF document text
    • http://bapozuwemixad.22web.org/aeroplane_punjabi_full_hd_video.pdfIn PDF document text
    • https://tefajakitom.weebly.com/uploads/1/3/1/3/131378990/sebuzipaxuj_vazowexefeme.pdfIn PDF document text
    • http://sudedelanefozuk.66ghz.com/ieee_template_word_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/5Agiejj/tesco_mobile_says_emergency_calls_only.pdfIn PDF document text
    • http://ruzagasaz.iblogger.org/falling_in_a_dream_and_waking_up_meaning.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/b3393a847ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujijanuzovaziv.rf.gd/71787275348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f98a222-0bf8-44c3-8581-da3f6e82c6b5/what_is_perturbative_quantum_field_theory.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_293d99433ca1458fad70cc9aedc1b4b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3579bc2d-53b6-4e13-a996-605e19c0e6d7/mubutoxelowikivosime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd86e79-7e19-4d87-8b88-a64befd2b0ab/vesivamojibe.pdfIn PDF document text
    • http://xizujibonow.epizy.com/18028445999.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_bfa3987b879c4df8ac0bea0e39d13918.pdf?index=trueIn PDF document text
    • http://lusunumef.rf.gd/bilinewamuwerufuvajeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d05c0c-4777-47ee-b434-375346c40db2/how_long_will_a_kinetico_water_softener_last.pdfIn PDF document text
    • http://lesasesodimavun.epizy.com/32779893984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d8fa36-48ae-4918-bb7e-416f19b096dc/video_conferencing_meeting_etiquette.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_8b1e3c849a1e438d804643049ade3232.pdf?index=trueIn PDF document text
    • http://zogutofarori.epizy.com/29414832120.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_582003ee632c4797a3da473232334dd1.pdf?index=trueIn 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_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 5564 bytes
SHA-256: 62d7a1e91a6cb9809dff30d946e2f996d0fbd8a6aa8d3d97f4d10e7a557dc85c
font_01_sfnt_off000117b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 12904 bytes
SHA-256: 9c8d11e784c5cbd94157bcb1e2b1973a2a125b7afb9464af0f5f0d108b041e9a