Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0b3e89074c5229…

MALICIOUS

PDF

121.6 KB Created: 2021-03-09 18:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ec6ac9d0130955209a75edf1a52469a SHA-1: c15b017761e6b094875dc42d7895b99038858a41 SHA-256: fc0b3e89074c52292ac4ad4c88c7149e4ac725cd2d4801a5aff1474347652ba1
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirectors and is flagged by ML classifiers as malicious. The document body, though obfuscated, suggests a lure related to software tutorials, combined with a 'download' heuristic, indicating an attempt to trick the user into clicking a malicious link. The presence of multiple links to disposable hosting further supports a phishing or malware distribution scheme.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/award?keyword=autodesk+revit+architecture+2020+tutorial+pdf In PDF document text
    • http://qwonder.space/641695998528pa2t.pdfIn PDF document text
    • http://probmaka.tech/2016_chrysler_town_and_country_service_manualkhywh.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/golf_buddy_watch_wtx_manual.pdfIn PDF document text
    • http://vobafoselalulor.mypressonline.com/bugomixol.pdfIn PDF document text
    • http://fullhp.info/lusukikumulifilebujhfl7w.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/volkswagen_tiguan_service_schedule.pdfIn PDF document text
    • http://autobaff.xyz/40861644950kwlar.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/concepto_de_interes_simple_y_compuesto_en_matematica_financiera.pdfIn PDF document text
    • http://newberginvestmentproperty.com/roland_tr_8_manual_deutschw92mh.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/fewovokobefunanusaferusiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/aluminum_oxide_crystal_form.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/smart_learn_button_on_raynor_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/capital_budgeting_sample_problems_with_answers.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/what_is_an_objective_theory_of_welfare.pdfIn PDF document text
    • http://pimuxexud.epizy.com/xefugivefekipin.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/lasko_ultra_ceramic_tower_heater_with_remote_control_costco.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/41190792272.pdfIn PDF document text
    • http://bokabofomejon.epizy.com/pulexumizoboxuto.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_off00014f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6E 25232 bytes
SHA-256: f8c1cad1d67d48576cf07a61885ca5f28340f1e096e803a0f70d239d97317e6e
font_01_sfnt_off00019f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F7E 5628 bytes
SHA-256: 9453d9eedf34f5fa14e0dfaa99a8b83704d2c95240c5de94d0124cf2f1af0265
font_02_sfnt_off0001b2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2A7 11212 bytes
SHA-256: 5ab7c6d0a8d640c23e255eb1d776989746d7feaf8b9d5c4619136fd67452b13b