Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fde1142fe18ba39…

MALICIOUS

PDF

68.5 KB Created: 2021-03-13 22:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: bc6dfb1df09267577c2af70d4c6cbd00 SHA-1: a6fa73e5e6cd21c8455eddb26c6d26173d67733d SHA-256: 5fde1142fe18ba3931c1695994ccfbf5209c6313a4da21313a0c47918eb64588
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or second-stage payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=build+a+snowman+sequence+worksheet PDF link annotation
    • https://cdn.sqhk.co/sarimotel/Ro6xja2/kunasosilovezer.pdfIn PDF document text
    • http://naturfresh.space/weber_spirit_eo-210_2_burner_gas_bbq._blackgr29g.pdfIn PDF document text
    • http://pumba.fun/49579387570wem7m.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/7354280.pdfIn PDF document text
    • http://instapriz365.site/active_and_passive_transport_quizoqhe4.pdfIn PDF document text
    • http://future-techno.ru/88025494373p2xs3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_5fe61d0b3686e.pdfIn PDF document text
    • https://cdn.sqhk.co/pinebiven/Kibicm8/robot_car_super_transforme_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_6031034be38e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_60122a5a6c7f2.pdfIn PDF document text
    • http://topcreditreport.info/finding_the_area_and_perimeter_of_odd_shapes_independent_practice_worksheet_answer_keyyyrfy.pdfIn PDF document text
    • https://xasananixekoweg.weebly.com/uploads/1/3/4/4/134442195/badazexinog-lumifatola-xuzemuf-kowaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498366/normal_6001cba84d6aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5fe9ef766e0f5.pdfIn PDF document text
    • http://geminomigokur.iblogger.org/boardman_tt_bike_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jheEhb3/nesenubadopuzigutami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_601227093b552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofipazefoleris.epizy.com/puzomafe.pdfIn PDF document text
    • http://wupebixa.epizy.com/gift_certificate_letter_template.pdfIn PDF document text
    • http://tubujaj.epizy.com/chaganti_koteswara_rao_ramayanam_free.pdfIn PDF document text
    • http://dagajevefud.epizy.com/rapiz.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_off0000cf0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0C 5508 bytes
SHA-256: a27f92593d21e805db2f6e57cded41418c390c9c01e2d94f7afddb44d260dd80
font_01_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 10276 bytes
SHA-256: ffb757bbce24e24c8a43a194a936a1f5ee9c62dc60c03b3e56a6fa424a7ad730

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