Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7f7958298671d3…

MALICIOUS

PDF

99.8 KB Created: 2021-04-28 13:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d1b9cecfe0d2ed5f3f218717fecf8930 SHA-1: 1214367ce13816cdc76ddc6bfd388fcd5b30e8cb SHA-256: de7f7958298671d3c4d7c1b386c5ab98f75e0fa6d707e50bed3e3d2db26ad1a2
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 pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to financial documents, likely to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=plan+unico+de+cuentas+bajo+niif+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416802/normal_604d63930033c.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/south_africa_blank_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_604467c07d2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5fd7791d777ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5fd5f3163dab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_6031dbd527f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_6040e8c8b1455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425515/normal_5ff35388f139d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5fe228a53245c.pdfIn PDF document text
    • http://kegojekazaso.22web.org/apple_make_appointment_in_store.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/the_canterbury_tales_a_prose_version_in_modern_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_6050b0b818269.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/givibi.pdfIn PDF document text
    • http://remunomixet.22web.org/26279044072.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/0f15aba5-f191-41bc-ab89-5e82d894e08c/fighting_climax_pc_download.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/accessory_to_war_download.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_a874f14996bf4f8a9cde21b58c609d49.pdf?index=trueIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_c212e4b2181747578ccbfed4df9d74e1.pdf?index=trueIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/surumofofufufa.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/trig_identities_worksheet_2_answers.pdfIn PDF document text
    • http://bodagoge.epizy.com/what_is_the_meaning_of_liminal_space.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91d6541-2fdf-4ecd-bb74-43de70a8aa2d/norojadususodejax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858607f0-7e7a-41e2-a688-678b58904493/diablo_3_official_game_guide.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_0324bf7d4c004be98a5fef1d37bbb41e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d79035-233d-41c7-a70d-2595f346144d/jitubijoxexil.pdfIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_b9f4b261ffe34e8087d57cee280b9588.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_off0001258d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258D 5204 bytes
SHA-256: 3b262881bf41f4db1d8131a25e65d2ef6822c8fe91f9d6cfd9222b348496fb30
font_01_sfnt_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 2236 bytes
SHA-256: 6a77f955d39b9d81e75477a2b3a68a06f90d7b352a411c8fd057aba46c531b2e
font_02_sfnt_off0001416c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416C 12348 bytes
SHA-256: caff36c1487a90f993d4f82d526de05eab8d94bce3bb2dba1d412ebf4850536f
font_03_sfnt_off000169dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169DC 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15