Malicious PDF — malware analysis report

Static analysis result for SHA-256 9204f6908d3a35e7…

MALICIOUS

PDF

76.1 KB Created: 2021-06-06 16:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ebd3d3f6cc155e2f70955645274cb4a6 SHA-1: 94257e89b477cb994bbe7957668ca0dd7baa4da4 SHA-256: 9204f6908d3a35e794410a212a0f90be8064a97b5751a4e995ecd2bd59d8538f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL and the presence of numerous external links point towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://catamma.ru/pbw?utm_term=pokemon+all+seasons+in+tamil+watch+online PDF link annotation
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/tuwas-revemo.pdfIn PDF document text
    • https://kamemixaj.weebly.com/uploads/1/3/4/6/134646558/40924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422163/normal_604d863f83b5a.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/6911703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379477/normal_5ff38deef17e4.pdfIn PDF document text
    • https://wuzubetimu.weebly.com/uploads/1/3/4/2/134266391/wogugosalur-xevuwid.pdfIn PDF document text
    • https://nefalitarula.weebly.com/uploads/1/3/4/3/134308949/sazitoveb.pdfIn PDF document text
    • https://zusebogodi.weebly.com/uploads/1/3/0/7/130740375/1346374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_602c2e0735caf.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/0674700.pdfIn PDF document text
    • https://zumikefu.weebly.com/uploads/1/3/4/8/134886628/dolamuwebexasax.pdfIn PDF document text
    • https://gibekadizekuni.weebly.com/uploads/1/3/1/4/131452913/2450683.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/1dc00ebb-a1c9-487c-9fd7-77db805a108d/zodifobedebenurax.pdfIn PDF document text
    • http://pulixojesu.pbworks.com/f/to_kill_a_mockingbird_chapter_1-5_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52f977b-bcdd-4274-bc03-815c4de34b00/31898586200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a974db43-305a-4fdd-8f80-f2befe7187b2/95430113270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd93900e-7677-47cf-8158-1a46c66c1b20/replacement_parts_for_hampton_bay_umbrella.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144678672/dubobukeruzunere.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144679752/open_and_closed_system_in_thermodynamics_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c3c284-9d82-4a58-ac38-c8e2ae2a507a/what_is_the_40_days_after_death.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144584088/how_to_write_divorced_parents_on_wedding_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db53c50-a257-4136-afb0-dd409cb3ff87/dajutasewetelutesisusev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5ae43f-947a-4c8f-ba13-1175364bd975/universal_laser_systems_m300_for_sale.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_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 5100 bytes
SHA-256: ad5abe3700a2d41047276bdff9798bc211de81c1e28ca0f55c2e512fb5371bca
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 11408 bytes
SHA-256: 64187800aff0980cd710cb6952391768521b78f263cf47bfd87563cadda2d155