Malicious PDF — malware analysis report

Static analysis result for SHA-256 375b651adba0d6a1…

MALICIOUS

PDF

103.2 KB Created: 2021-03-18 08:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9bba169e414c2fade69c5630672609c9 SHA-1: 19b584042c8e3465be05d7ba5c0562ae9b0dd86d SHA-256: 375b651adba0d6a1030f4565929fac45a9c1996663cf630546eca4b5dde31d0c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The embedded content, though heavily obfuscated, likely serves to redirect users to these malicious URLs, potentially for phishing or malware distribution.

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://vilenefex.ru/wix?keyword=rayman+3+hd+trophy+guide PDF link annotation
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/4625364.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/3679790.pdfIn PDF document text
    • http://navaram.online/86272075957njbyy.pdfIn PDF document text
    • https://vomuzubedabop.weebly.com/uploads/1/3/0/9/130969103/4c6e73fdd.pdfIn PDF document text
    • http://volosaty100.xyz/991191795a7qic.pdfIn PDF document text
    • https://dexigator.weebly.com/uploads/1/3/6/0/136049715/jujuzonuluduk_vunebekimiwave_jakegej.pdfIn PDF document text
    • http://dorightpress.com/forest_exam_answer_key_linkzhmpb.pdfIn PDF document text
    • https://razesune.weebly.com/uploads/1/3/3/9/133986972/f50a3da9ef152.pdfIn PDF document text
    • https://nagafijobe.weebly.com/uploads/1/3/4/6/134621550/jipoz-faxenonimuzakud.pdfIn PDF document text
    • https://bakadowo.weebly.com/uploads/1/3/1/3/131380427/2fe8605ab3.pdfIn PDF document text
    • http://poroda.site/adobe_premiere_pro_cc_2019_downloadk28t1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://807eaacf-9fb6-4e16-bcb8-061395d1d132.filesusr.com/ugd/a3ef2e_141e82f9b2bf40f9aecf0d9c95a42151.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c26e46a-dd81-42ff-b65e-c99e455aaddc/satupalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b2a3f9-67be-4217-9635-5ca8c56bb339/52787463786.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_1c0a6bf0824a42ccaa8af7abf2563d97.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_f6b27232c35f4ddbbda2d915c61df0ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/year_end_report_card_remarks.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/govatuwotazuzezexe.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/justin_bieber_songs_pagalworld_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/harry_potter_game_2020_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49d3d8b-629c-4537-bb00-7e15b537194e/52089686502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d22053-8cc5-4c68-a7bd-d86bf1ab57e5/kojofofinixizonavob.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_d5de1544ecfa436188efb030bc8fade0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/mobatogapapami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173125c4-4990-4b0f-99e0-b4ad48febd9f/the_far_side_gallery_comic_strips.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_off000156d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D6 5436 bytes
SHA-256: d074144e4fd34fc0ea76bf443fbf6c7c3c627d061cd2d629fa5201a6cf8ab64e
font_01_sfnt_off0001693c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1693C 11308 bytes
SHA-256: addfa379cd2a0cc10d19c92fd2be05f429caf523b3e584518552b6740b74cfb4

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