Malicious PDF — malware analysis report

Static analysis result for SHA-256 090a9be6eb48646d…

MALICIOUS

PDF

94.4 KB Created: 2021-03-14 13:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 066938e5b16b7ee242955b4c51114152 SHA-1: 56f49d42451e32a91f441820279741121a7f45bc SHA-256: 090a9be6eb48646d0ccb052a051a001941786b2957f8a927377b9314973abd6a
146 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a callback phishing lure, prompting users to call a number for fake issues. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites or initiate fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kuzutuzo.ru/award?keyword=academic+english+reading+and+writing+across+the+disciplines+2020+pdf PDF link annotation
    • http://daating19.site/what_is_heinrich_domino_theory0vtza.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/VhjicJb/93271690289.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/5HEShbr/taboxojamafevab.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/2gecjgO/vitub.pdfIn PDF document text
    • http://alania365.ru/dopixozosusepuziwobixosefxaoxx.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/lepizo.pdfIn PDF document text
    • http://ligazilafibab.22web.org/69008400084.pdfIn PDF document text
    • http://xitawefavam.medianewsonline.com/xevofalu.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/Uhi6m5Q/kubivodijafetuwonat.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/sufilu.pdfIn PDF document text
    • http://jibiduseg.22web.org/94229863609.pdfIn PDF document text
    • http://fesunasisodenod.getenjoyment.net/pemenaguguralubeti.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://rokidibamufoduv.epizy.com/gilalisemibitomigor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08612a7e-1170-40a6-8ad2-1c153021ede6/best_push_pull_legs_5_day_split.pdfIn PDF document text
    • http://dasiletu.epizy.com/23810631819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a788ef-52fe-48db-9dc8-f72b5613da86/51437754146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c73ef0-e9cf-4c4b-a6b1-784ca1d554a3/cooks_essentials_bread_machine_instructions.pdfIn PDF document text
    • http://mewudupite.epizy.com/83035168975.pdfIn PDF document text
    • http://dowisekek.rf.gd/manualidades_faciles_de_madera_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd48318e-6ab1-42ef-aa63-eebbf73b0618/technical_writing_degree_reddit.pdfIn PDF document text
    • http://bewojux.epizy.com/page_border_for_ms_word_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9fa2bc-9070-4644-a35c-21dad2d88629/what_is_maternal_nutrition_in_pregnancy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 5712 bytes
SHA-256: eed27ad6744fb049e81d049038cd1d97b009fa055b95a25c68b5486b57624b8c
font_01_sfnt_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 11520 bytes
SHA-256: 8edd1862c493772b49cc3017023d3f2bf4af88345518042bb023653783898b9d
font_02_sfnt_off000147ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147AC 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00015cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CDA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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