Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e35cbc582f5de33…

MALICIOUS

PDF

76.1 KB Created: 2021-03-21 11:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0b4a8b88e7587d1c7bb29888c72f3d1f SHA-1: 5f554fe3b5218f58d8ed2e0c656f491d53cd416f SHA-256: 1e35cbc582f5de333df3bd0d790252f59455c927894db9acf0e72627473b233f
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. The heuristics reveal it functions as a link farm, containing numerous external links, with a primary URL pointing to a suspicious domain. This suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=sky+dispensary+mesa+az PDF link annotation
    • https://waragorejitise.weebly.com/uploads/1/3/0/8/130813548/cc37c30fd32ddd.pdfIn PDF document text
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/c747bc6a7e27.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/2999746.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/4358163.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/6991583.pdfIn PDF document text
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/kugota-lawutiw-pisumejes.pdfIn PDF document text
    • https://vigusukababimer.weebly.com/uploads/1/3/4/8/134881512/lotiloxidefile_sufata.pdfIn PDF document text
    • https://kipamafulu.weebly.com/uploads/1/3/4/5/134588126/mofevugivuneve_wejadaleje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_5fa6f7d21daf4659bd902c0eac003523.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_292e572c0d89441c8343cca922bc2f6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falejogajir/midexuta.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/marine_corps_physical_fitness_program_mco.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_a612da731ece4de0958eb8ff8b7666ae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/df00a661-338b-4f60-93e6-d8072e931275/dyson_dc18_undercarriage_assembly.pdfIn PDF document text
    • http://vekabun.myartsonline.com/dell_inspiron_6400_ram_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2652ff65-7571-4066-bf5e-0ef84e8212b3/61378843261.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_999041018db94e9ca819314f070832cd.pdf?index=trueIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_b4f17a6bfa4f45f3a2ce7ca1c8a6d4b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/jizogusige.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_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 5392 bytes
SHA-256: f9762a876467fc9db2ea0701eeba27bd7f8591380dcdf1d31b5ab8edb28b370b
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 2628 bytes
SHA-256: 5a42c704e6c3a6aea2b720483e32dc78f7b94d6625dc57227243add9b94600fb
font_02_sfnt_off0000fa86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA86 11440 bytes
SHA-256: 02103724051a9c88b4fc219ef08e99f5a5d918d03287121943392d0d462583c8