Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0fe9c60826f652…

MALICIOUS

PDF

67.4 KB Created: 2021-02-21 02:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 85caf0deea1046cedf63735801981703 SHA-1: 2e2eddd7189fba39fd1cc7cd6eb383e5a391f658 SHA-256: cb0fe9c60826f65229bdbfe65f0d93b8670f9046c0c638ae311e0f4776a76935
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous embedded links, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate it's designed to redirect users to malicious content.

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://maypoin.ru/strik?utm_term=vishnu+sahasranama+pdf+malayalam PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fdfde781e486.pdfIn PDF document text
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/551a065c0a09fc6.pdfIn PDF document text
    • http://natlegend.space/arapa_renme_kitap9t7f4.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/moragusevolodako.pdfIn PDF document text
    • http://uaregroup.com/wedavemobageutg7y.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/physics_world_magazine_subscriptionbz8mj.pdfIn PDF document text
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/9579257.pdfIn PDF document text
    • http://ru-dev.xyz/easy_guitar_tabs_for_beginners_acoustica3g56.pdfIn PDF document text
    • http://reabook.online/bipozerajiwelewe1g0i9.pdfIn PDF document text
    • http://fakaripeti.xyz/jubuzanujglzgp.pdfIn PDF document text
    • http://kkkirrreeee.space/xunezubidozaligugifabw2wif.pdfIn PDF document text
    • https://welomutulek.weebly.com/uploads/1/3/4/8/134873792/2310822.pdfIn PDF document text
    • https://nolizusumebixaz.weebly.com/uploads/1/3/1/4/131438071/6713656.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://movozenumoz.epizy.com/rimworld_ice_sheet_tribal.pdfIn PDF document text
    • http://tijopuzotozume.rf.gd/56670162609.pdfIn PDF document text
    • http://rolodumom.epizy.com/9th_grade_algebra_practice_problems_and_answers.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_off0000bff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF3 4924 bytes
SHA-256: 4684458df21aaa6ee714c4ca8966edcafdfa2a87d7d7a54a6d72da17bc7451b0
font_01_sfnt_off0000d067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 9940 bytes
SHA-256: 5fa66aedc74a886ba139befcb5434a3b47f5323b6980b1c08786b4e56df9bc40
font_02_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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