Malicious PDF — malware analysis report

Static analysis result for SHA-256 079ce916cb57fb0b…

MALICIOUS

PDF

102.2 KB Created: 2021-02-18 06:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 118cbb60826e3cd90cbf52197490ad25 SHA-1: fa1e4d11aa265c44c143276a98ea905037a4f8c4 SHA-256: 079ce916cb57fb0bc3f2b6f78d4259fd82d8702cd06ecd838db6af9320cf91fa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a notable heuristic flagging it as a link farm on disposable hosting, pointing towards phishing or malware distribution. The presence of the URL 'https://jacksth.ru/strik?utm_term=can+you+replace+garage+door+openers' suggests a lure to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/strik?utm_term=can+you+replace+garage+door+openers PDF link annotation
    • http://pofepan.iblogger.org/gizomupegibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_6027831c8f0b7.pdfIn PDF document text
    • http://eeeeeyyy.space/31646822855szt4h.pdfIn PDF document text
    • https://zufezegudowoz.weebly.com/uploads/1/3/2/6/132683286/4910078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd63c9835285.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/dobajam-raruxuzaj.pdfIn PDF document text
    • http://masterpowerpoint.com/polasexawi3csmy.pdfIn PDF document text
    • http://rikuximuvo.iblogger.org/baird_tv_user_manual.pdfIn PDF document text
    • http://grafoanaliz.ru/mobility_scooter_owners_manual9z35g.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/answer_2019_gear.pdfIn PDF document text
    • http://xekizarobofoza.22web.org/1847243007.pdfIn PDF document text
    • http://muwabiva.iblogger.org/wegaregofasafu.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
    • http://madukavinoxonal.epizy.com/zanavosibekeduborof.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/butijumelu.pdfIn PDF document text
    • http://fuvituze.epizy.com/clostridium_difficile_guidelines_2017.pdfIn PDF document text
    • http://fufezexu.epizy.com/26634203317.pdfIn PDF document text
    • http://pexaniruvuwuwe.rf.gd/cara_buat_cv_file.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/hepatitis_b_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/bodybuilding_tips_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/87383705602.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_off0001468c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468C 5120 bytes
SHA-256: df98d58e3aa8bf8e8b4a965efc52c6a8e064f069a2ab646870825ee470933a4b
font_01_sfnt_off00015800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15800 10828 bytes
SHA-256: e88db2b83b68ae01f5c0b547664d1a22c0add0a903bbfaaa2a06714b499f0ad3
font_02_sfnt_off00017ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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