Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6bccce723e1314…

MALICIOUS

PDF

111.2 KB Created: 2021-01-24 20:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6870f95d7e1f8c4048518d246c3a79ff SHA-1: 21d8cea00cd8b77bf3386d56f47b1ed849df2448 SHA-256: 4e6bccce723e131454ef55b3516a5af6d2febb95b48ce8a9a2ac19e4b209bc08
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one pointing to a link farm designed to redirect users to other sites. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to direct users to potentially harmful 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://traffset.ru/123?utm_term=chrono+shindou+v+series PDF link annotation
    • https://cdn.sqhk.co/dajebala/ba7ghhi/photo_collage_ideas_for_wall.pdfIn PDF document text
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/dototipimateg.pdfIn PDF document text
    • http://zakoroxani.22web.org/amboli_ghat_information_in_marathi_wikipedia.pdfIn PDF document text
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/4398881.pdfIn PDF document text
    • https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/dc7ead1b702063c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5ff8c1bb1fa6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459794/normal_5fe79f685beff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fe929b6ac766.pdfIn PDF document text
    • http://kudezixajuxuni.66ghz.com/google_bookmarks_android_app.pdfIn PDF document text
    • http://vagoneviwesum.66ghz.com/28274956112.pdfIn PDF document text
    • https://jujuguzifise.weebly.com/uploads/1/3/5/2/135299578/7038569.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/Wifif8u/mufurimufupoxagavij.pdfIn PDF document text
    • https://vuzeruferule.weebly.com/uploads/1/3/4/5/134591890/9178206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josegofubusem.epizy.com/15152648952.pdfIn PDF document text
    • http://mibofive.epizy.com/best_emulator_for_android_app_development.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/61282480048.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/austria_visa_application_form_saudi_arabia.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/best_antivirus_and_malware_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/9th_biology_book.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_off00016e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E65 3596 bytes
SHA-256: 4bcc4af277a5b272993ea1045a108eb1cc4afcefe3d50bbfcc58f702fd8f94cc
font_01_sfnt_off00017b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B34 4636 bytes
SHA-256: 82c54612963976be3bb7b8682db043af647b662fca96c0d6da23c75b2d37caaa
font_02_sfnt_off00018af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF1 10572 bytes
SHA-256: 9be20335313ed2accd10112c4e5d26ba175d692521f9d8b6c2f7d93639783bec

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