Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2be7f26a52f06e…

MALICIOUS

PDF

79.7 KB Created: 2021-04-03 15:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f31f51271d99ba3d816052f9c4faf26f SHA-1: 7380c5d27bb21e638210c6eb714c64c2ebea3cb9 SHA-256: fd2be7f26a52f06e71d95cc0c0a9eb14df25490a629f75fc2f19450871c15484
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 0.9993

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://lozipotod.ru/award?keyword=balance+sheet+pdf+to+excel PDF link annotation
    • https://tixedasuke.weebly.com/uploads/1/3/5/9/135979549/5429549.pdfIn PDF document text
    • http://ayazshabutdinov.club/yamaha_rx-v679_service_manualc55fn.pdfIn PDF document text
    • https://ravikuzisuwu.weebly.com/uploads/1/3/4/4/134470025/0f8e34cd85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424013/normal_5fc95c1710951.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/what_are_the_basic_questions_asked_in_mechanical_engineering_interviewjzhdg.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/kasiduxin.pdfIn PDF document text
    • https://gikovasedubum.weebly.com/uploads/1/3/4/5/134507074/69291f45.pdfIn PDF document text
    • http://grigolia-studio.ru/86884922793646mw.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/4d6851339d664.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/optimise_file_size_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_604798701ee2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_602a356067af3.pdfIn PDF document text
    • https://nimuneroz.weebly.com/uploads/1/3/1/4/131407882/ce4715c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_60237feb78d4a.pdfIn PDF document text
    • http://gipovasota.sportsontheweb.net/amphitryon_kleist.pdfIn PDF document text
    • https://warazafipa.weebly.com/uploads/1/3/1/3/131381481/2511116.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/xewumurusojexoziru.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/68059243191.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/a8d06aae1.pdfIn PDF document text
    • https://fobabugukejapa.weebly.com/uploads/1/3/4/5/134576868/477501ef12de7c4.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/8b05e495502.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/bajaj_dominar_400_specification.pdfIn PDF document text
    • http://xteenware.online/python_interview_questions_in_tcs_ninjawos1m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakogabutal.onlinewebshop.net/38778572472.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/brazzaville_beach_william_boyd.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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 5264 bytes
SHA-256: 88e05b675b95f901d10ad10b34656c4c61588adbb22d03155020619a0096c2aa
font_01_sfnt_off00010b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 11456 bytes
SHA-256: 16c04cc3304daf20032055400eccc8902e48e8d643179749f8a612dddf32d209