Malicious PDF — malware analysis report

Static analysis result for SHA-256 9102d4a45642dc72…

MALICIOUS

PDF

70.8 KB Created: 2021-04-06 13:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c4f893b9ccb002e8e863aa68f788a734 SHA-1: 4630155e294f394bf453552805397b75f4dfbae4 SHA-256: 9102d4a45642dc720f6f7442a705d7e7a6b7b29bee9a2b99550e2db2b60e2d9c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name of Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. An external URI, https://jumiwimov.ru/strik?utm_term=measuring+and+constructing+angles+worksheet+pdf, was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Measuring and constructing angles worksheet pdf', indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=measuring+and+constructing+angles+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/salobosemiv/fjgYhat/51410365795.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/gicghPI/82086461926.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/jfhhgi9/growtopia_change_your_password.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/ajdjfgc/little_mermaid_photoshoot_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_60651b8b0ad23.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/highSiT/kujizimebe.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/c1hgicS/zajowiza.pdfIn PDF document text
    • https://cdn.sqhk.co/numobelez/wohahgd/supiveporogufuma.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/dvjaFFh/trap_world_cup_2019_soccer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5fc614c0232a8.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/hNjjDij/arcade_fire_everything_now_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_6025c18dcdaee.pdfIn PDF document text
    • https://cdn.sqhk.co/favosejo/tsc2dha/block_puzzle_star_finder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_600dffe8c6728.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/EdhjijQ/alice_in_wonderland_runner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_60289189b71f2.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/pavujiniz/kobebidewiwosutax.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/gaceta_oficial_de_cuba_aduana_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/kelumulovoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32de4296-de86-456a-87d0-f84a0317785d/98692435834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b6162a-9fd2-4241-a79e-2a994bfc904a/fajarimezozomifuvowinor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7788c5aa-ea69-4763-b729-94c22bd21426/synopsis_of_the_play_she_stoops_to_conquer.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/does_firehouse_subs_have_wheat_bread.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/alberta_student_loans_and_grants_funding_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc32bcd9-74d3-4af7-b6ce-e1014c2c3294/90892147010.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_off0000d7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 5580 bytes
SHA-256: b09425ded47c4002bf9fff0f2957c19320187ddb2986a41e8bcada7fe08c61d9
font_01_sfnt_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 10164 bytes
SHA-256: 64320ac9671c53b14adf0363259493d6e8f84517fbfb6f03c15ce6a7125f4b72

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