Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5721f7407da8ef3…

MALICIOUS

PDF

118.6 KB Created: 2021-03-28 22:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7f0acf4d65e82292c5a36c4893f0afd SHA-1: 76026bf61f727cfc8c5970350af00b3fb8bf3fbf SHA-256: b5721f7407da8ef3a5efc0b0f1c0498a5a58a8b33f28ed6483aca93eb17e29bb
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=jbl+on+stage+manual PDF link annotation
    • https://cdn.sqhk.co/bajafigotuvi/jeezidj/97431032382.pdfIn PDF document text
    • http://begdas.fun/frigidaire_top_load_washer_parts_diagramj5ga6.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/eSigKhe/rebaxuxojutusakadarobo.pdfIn PDF document text
    • http://cleanup-sale.site/finajozevalelakepesizuzud700p.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/hghU2UX/69801580538.pdfIn PDF document text
    • http://stonersfranchise.com/kitidabujutimabolevu3hzrp.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/dOjjIhb/you_are_not_answerable_to_me.pdfIn PDF document text
    • http://riragukigud.scienceontheweb.net/bujupidek.pdfIn PDF document text
    • http://trokot-shopnew.online/526015661868dzy.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/adobe_illustrator_cs6_tutorials_in_urdu.pdfIn PDF document text
    • http://crysety.xyz/fall_under_a_spell_in_spanisha63sg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_9f7b937233f64ec7b2ce6d3f65d9652b.pdf?index=trueIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/84482957439.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_b8455e7a8ced4f4997c3ab1e569eb2d0.pdf?index=trueIn PDF document text
    • http://bowegasobufur.myartsonline.com/bulk_up_diet_plan.pdfIn PDF document text
    • http://tanonarimunal.myartsonline.com/cloud_computing_infrastructure_as_a_service.pdfIn PDF document text
    • https://0bc2ebcf-5b85-435c-8290-6c6350a165f2.filesusr.com/ugd/ee98f5_a6e367284dcb48a1b00125ee9572e46e.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_1f0145398cb04c79aa93b2aed03af6da.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_4a78553868f344e8a73e7c932591bc2b.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 42580 bytes
SHA-256: 2ccffb8295e75f5e872eec84de39ddc0173b909c6c35a616a4ad5a1f451180d3
font_01_sfnt_off00017cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CD7 5040 bytes
SHA-256: 3a3eaf91e0704d4aff941c451dc2d34b24ab56256a71337ec85b94349a4681f0
font_02_sfnt_off00018dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DEC 11824 bytes
SHA-256: 013aa90d499400fb0cb3f88355f46b328f4652e8df7dc05e6c2c78a396fed70b
font_03_sfnt_off0001b503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B503 16160 bytes
SHA-256: 31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462