Malicious PDF — malware analysis report

Static analysis result for SHA-256 042c418d8ef75ab1…

MALICIOUS

PDF

72.9 KB Created: 2021-04-03 14:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 621d86ec2e1b052ccff32cbbed79aaa8 SHA-1: 19ea62a0c32a4f32baf112e5d4ed857e3f2d89a8 SHA-256: 042c418d8ef75ab1647fc7f585adcf5e5f99d312121741a088b674e800e23bd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically mentions 'adding filter in ssrs report' with a UTM term, suggesting a lure for users searching for technical solutions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that this PDF is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=adding+filter+in+ssrs+report PDF link annotation
    • https://cdn.sqhk.co/xawobovuji/fMRfjBC/17030205317.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/ieiaiaP/vokulujala.pdfIn PDF document text
    • https://cdn.sqhk.co/nokodexuxof/kGiehay/amazon_alexa_echo_app_for_android.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/pikejumiveludisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_6056b70e360b8.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/2T7ia8B/9075634913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5fd2e0337c43a.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/fjicn83/x-_wing_flight_stick.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/eIiarjb/55781464952.pdfIn PDF document text
    • https://cdn.sqhk.co/xojugako/co6oiUS/kingdom_rush_tower_defense_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449599/normal_5ffe1d146036e.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/iozienj/wizened_rebuke_god_roll_pvp.pdfIn PDF document text
    • https://cdn.sqhk.co/titesojijuko/fiaHSjb/46743320198.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/dAtAgdx/celtic_vs_hearts_live_streaming.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/77295173707.pdfIn PDF document text
    • http://vafutixon.22web.org/concept_of_creative_accounting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_602b3c46e0e36.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/vobonojiregebabuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejivuwipo.epizy.com/mechanical_drawing_examples.pdfIn PDF document text
    • http://kisomelug.rf.gd/what_is_an_organisational_structure_business.pdfIn PDF document text
    • http://gugogedufos.epizy.com/90875377855.pdfIn PDF document text
    • http://netasok.rf.gd/41112932524.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_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 4988 bytes
SHA-256: 8cac1b64e13d4986f6bbb7bb42be55c9a248e08eab9e9cda96d2ed3a43e36126
font_01_sfnt_off0000effe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 11300 bytes
SHA-256: 5565efc3d4d25d593c83bf8195d5746bb80ebd0e8c37459d7b4d58e988a50c72

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