Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a5fd8f8d2a2b44…

MALICIOUS

PDF

92.7 KB Created: 2021-05-07 09:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7e7bc463b671ae20e4643cabaee2d275 SHA-1: 335fb51f61987b8534a587932492231bb70cceb4 SHA-256: d5a5fd8f8d2a2b4421b4371424f7793bed87b03a1c01b3238ea1ca470cf10935
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to contain metadata related to 'Tattoo designs of japan book' and the wkhtmltopdf tool, likely serving as a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://ponafet.ru/strik?utm_term=tattoo+designs+of+japan+book PDF link annotation
    • http://masito.space/99081070254ngrj0.pdfIn PDF document text
    • https://fovevirikat.weebly.com/uploads/1/3/0/7/130775443/47c66f5.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/febasuniwumuxeli.pdfIn PDF document text
    • http://trylait.pro/ge_33709_4-device_universal_remote_control_setupdwchw.pdfIn PDF document text
    • http://fubewakixodi.22web.org/the_other_side_of_heaven_1_full_movie_download.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/27877913371.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/4177263.pdfIn PDF document text
    • http://detonicinitalia.website/tajubijuwixusutane6jo3z.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/justine_marques_de_sade_descargar5rmx5.pdfIn PDF document text
    • https://jokiwuruxuwam.weebly.com/uploads/1/3/1/4/131437523/74d5c6a2d.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/3_articulos_de_la_constitucion_mexicana_mas_importantes.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/zifijubadup.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/what_lights_on_dashboard_mean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_18202ff0a59f4d61b3cb9aeabc9cc5fb.pdf?index=trueIn PDF document text
    • http://sobajagas.rf.gd/2718613388.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_d375c95410a94577b9f07333538f8162.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47af30e-ecd0-4431-8efb-75eff65f7d8b/michigan_child_support_case_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94d3010-8a1b-4631-9435-4bbd591a15fe/kelikebeduri.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_a4f7a1fce97346e5b8e62cea7470c0c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/414565d1-dd5c-46d2-afe0-f2491af0f03c/wiriderasis.pdfIn PDF document text
    • http://pujumek.myartsonline.com/50887381965.pdfIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_ba5a4ef9a01c492ca7a533bc15dc183f.pdf?index=trueIn PDF document text
    • http://suduxegowur.onlinewebshop.net/systme_bielle_manivelle_exercice_corrig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7029f765-2df8-4aa9-8536-f519fa146a4d/hp_scanjet_5590_flatbed_scanner_specifications.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_5e3fa06cae0c47ecb55255933bce5a23.pdf?index=trueIn PDF document text
    • http://puwokamavureme.rf.gd/80488722944.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001195c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195C 5616 bytes
SHA-256: 0acfc878cf7c7bc45fe72e0f16dfa5cbc2e6e6e7631f7fcc83786be45131553b
font_01_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 5308 bytes
SHA-256: 8b9016b851172b2fca440d9806f946839c90650d9bef3d754d6ca9b2a3fe1825
font_02_sfnt_off00013f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1C 11320 bytes
SHA-256: 4f511dde28ee91a763e8f0fcf7cf9dca274cfb40fe3b559b69c8667af81bb050

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