Malicious PDF — malware analysis report

Static analysis result for SHA-256 199432fdf825e35c…

MALICIOUS

PDF

78.4 KB Created: 2021-03-06 04:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f44c753c02afdac3a57e319cdce7fcd8 SHA-1: e3b34e585d392642e984a52736d3f78f791785ee SHA-256: 199432fdf825e35cb4fbd65b21ff3f812618c2bab883c497cb5d8c8e9393b710
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=why+do+we+celebrate+constitution+day PDF link annotation
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/sakapakelel_wukizivekag_kelopakale_mijuxejalodix.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/jifibazufikoxabofa.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/brandon_sanderson_wikipedia_espaol.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/59739263721.pdfIn PDF document text
    • https://widetidutu.weebly.com/uploads/1/3/1/4/131453832/pegesimu.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/weful-tagowatisaz.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/belinulibodun_zikuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_599c8b69779e4febb0f61672db80ddcf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/pencil_drawing_images_wallpaper_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8e7c6d9-a12d-4312-9a05-7ae83df001e7/sipasik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185cffa5-baad-4f8e-bc03-9f96e025b863/tareniwixizetimizepi.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_48b884eca2c84273a9ba8b5b509c5663.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b3ba30-adc0-4513-a160-dc05977ec07e/is_ninja_a_good_blender_brand.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/29016398330.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_d135739210794303bcda97da7e53930e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/jafobaziduxofivitoles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e94d7df7-a322-4d1c-a6ec-e93beb4b6d76/vegan_cookbook_for_athletes.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_ce5cf77f9d0b4b7297275a04dee2f378.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_cbb9c4432bc44282a75bcc73d209f174.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc09cf8-1bf6-46fa-b874-53c80ff7c02c/where_to_place_tens_unit_pads_for_shoulder_pain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1583a9d1-eeba-4ec7-90c8-32e5342fd8f9/resolucion_de_ecuaciones_de_primer_grado_con_fracciones_y_parentesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dffc8-ce6f-4e95-857a-13281bf42594/what_are_the_three_elements_of_poetry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca2da59-d609-4e3c-8f6b-a61e85816968/bravos_xl_mct_dryer_wont_start.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_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5256 bytes
SHA-256: 389b9a431907ba2c9fdbc44067aa771b859f872e00f345d0e2e037c22189cad7
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 9852 bytes
SHA-256: 65d9f5d786a1ca386a60aa48c0f869d2156ff39fb36b34c159dd8e601a307f49
font_02_sfnt_off00011dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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