Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c331be5fcb69a0…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 10:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2f974b0ffb58ae7abee9acca9424fc SHA-1: 78c994eacf337a66f943c11faa678e4bf50ac8f0 SHA-256: 99c331be5fcb69a0134ffc3efe4269fa0fe324aa275f2258387c4c393f4dc9ab
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=sample+history+ia+questions
    • http://mofopafilubo.22web.org/american_standard_platinum_95_furnace_manual.pdf
    • https://cdn.sqhk.co/fuluzagile/jbhhjjg/12672177709.pdf
    • http://sadugumipid.iblogger.org/lipizite.pdf
    • https://cdn.sqhk.co/rekewuneboxu/AGoQ9ia/paintball_usa_el_paso_tx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://remagemutadaf.epizy.com/42407302523.pdf
    • http://zikinevubebera.epizy.com/47164732000.pdf
    • https://uploads.strikinglycdn.com/files/6058fd6f-1fd0-42cb-8ee1-6a32fbb25d56/how_to_program_my_dish_network_remote_control.pdf
    • http://turopam.epizy.com/72054169391.pdf
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_d32964a182824614beb8b8346e507315.pdf?index=true
    • https://s3.amazonaws.com/nafibanefexex/povapijiloxiganivim.pdf
    • https://uploads.strikinglycdn.com/files/ed883bc1-9f2b-466a-bef9-f3f5429431b8/2016_dodge_ram_2500_6.7_diesel_owners_manual.pdf
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_96088a82c62f4137a4656a64ac4eb1a6.pdf?index=true
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_f4458305034541ac8cc26fb7361cc40c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1a6bce3e-0c5d-496e-8c1a-b8cb437c3d01/50638321120.pdf
    • https://uploads.strikinglycdn.com/files/939ab5a9-040f-48d0-9568-2c64f1565074/vintage_betty_crocker_cookbook_1950.pdf
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_ed1d535205ba4b6c8b0b0ee1efa974dc.pdf?index=true
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_52aa131afc4444eeb9589fa7d591d5ff.pdf?index=true
    • https://s3.amazonaws.com/xofalepelala/46278508868.pdf
    • https://uploads.strikinglycdn.com/files/f9a36ab4-5270-49da-be43-9f9f9e8d88f4/zuvovokatu.pdf
    • https://s3.amazonaws.com/begijufadi/88270575757.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_7dec5e6fcddb4475bda10ce878bbb366.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf3.bin
1e32d84228ce08c7f3209d8560ba56f49fea321c4555e33f9a77480abbf07abc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 5388 bytes
font_01_sfnt_off00010d21.bin
f14a3e71d38dff71eae1be09988b55dbcb9efdd086105f11401ea44af1e9f9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D21 10980 bytes

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