Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6244eb49e887d6…

MALICIOUS

PDF

99.2 KB Created: 2021-04-07 08:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f28088a38625e9a9113ce2e46cbb9cc0 SHA-1: 9b04b9eae36c929ea029fd7c99ba8a433b669ba7 SHA-256: 0e6244eb49e887d60d28fd0d859ce7b85e0661f2d3820565f72728b5e31ee228
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 0.9992

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.
  • 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://pelibifir.ru/wix?keyword=kenmore+ultra+wash+dishwasher+manual+model+665 PDF link annotation
    • http://mokaxizekebade.scienceontheweb.net/anatomia_y_fisiologia_del_higado.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/5d3d2a19-d54b-4f7c-b563-3db63878fe3d/how_to_achieve_effective_communication_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b483fa-eeab-4852-abac-41371885add0/68073834560.pdfIn PDF document text
    • http://rusevilo.rf.gd/honeywell_xenon_1900_driver_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc260344-53f0-4400-aef4-203dfd87a0d3/41419694069.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/30335074644.pdfIn PDF document text
    • https://f16fa5c1-8556-4bba-8f86-04d9c108beb0.filesusr.com/ugd/2c3d75_8cba1b004497432fb255fed7191b0d1a.pdf?index=trueIn PDF document text
    • http://momewitu.epizy.com/b_t_c_ki_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/how_to_do_self_hypnosis_wikihow.pdfIn PDF document text
    • http://nuzifopivezalam.rf.gd/observational_astronomy_book.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/28779293179.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/can_you_notarize_for_a_family_member_in_tennessee.pdfIn PDF document text
    • http://womidelere.myartsonline.com/54108904461.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/dr_seuss_paperback_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/fnpf_employer_portal_user_guide.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_4634f48b5d7f4ed1b700c080097742db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c08bd7d-bd85-4c0b-9f20-adf491d13678/ruzolefavopesi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/cg_dj_song_2019_mp4.pdfIn PDF document text
    • http://jufafiwosekugon.rf.gd/hardy_boys_cast.pdfIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_b4b4b0360b1f45dda3798fa199c3173c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f9a37e-b0c3-45ee-897b-9b4fa1e3f227/93776640751.pdfIn PDF document text
    • http://wipupagajefi.rf.gd/87564616964.pdfIn PDF document text
    • http://zesirares.epizy.com/pibitudamasidan.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_59c955e29ed046f38cc8da97a12982a9.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_off00014360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14360 5404 bytes
SHA-256: 3f3b9c476dfc33edd161e317762e379ee4e79dade8f16cbbec27a1b3df78f99c
font_01_sfnt_off000155ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155AB 12488 bytes
SHA-256: f748e7f94d8aec4fbeab52dddf8b539b2e38db215f5abf2d9773f25e79eb9d36