Malicious PDF — malware analysis report

Static analysis result for SHA-256 7730f4040ea24b84…

MALICIOUS

PDF

83.0 KB Created: 2021-05-03 22:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e88ff12af455ecdfc3b546edf348d760 SHA-1: 6e6bd70e43a50fd91fa78899dad9fe8a88e0a7e4 SHA-256: 7730f4040ea24b84d11eb45de261081e11268121778959794fd3b21b961e617d
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection. It contains an embedded URI pointing to a suspicious domain, likely intended to lure the user into clicking and visiting a phishing site. The document body, though heavily obfuscated, contains text related to human evolution and meat, which serves as a pretext for the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=did+humans+need+meat+to+evolve
    • http://creditscorecard.info/15414877597zf81o.pdf
    • http://zumepaposakuf.scienceontheweb.net/ortodoncia_y_ortopedia_maxilar.pdf
    • http://helpcreditscore.info/risk_assessment_form_for_mental_healthefrga.pdf
    • https://dizilezojo.weebly.com/uploads/1/3/4/2/134234798/8479325.pdf
    • http://debuged.mywebcommunity.org/macroeconomics_blanchard_7th_edition_free.pdf
    • https://cdn.sqhk.co/mogizufofuj/eihOOf4/razas_de_perros_grandes_y_peludos.pdf
    • https://cdn.sqhk.co/sifalavuxozo/gZejh0M/boat_parking_3d.pdf
    • http://tapozifokun.mywebcommunity.org/81729205968.pdf
    • https://cdn.sqhk.co/batitiviz/eic0gh0/29390276241.pdf
    • https://cdn.sqhk.co/koluvukirate/8KL3TMx/swift_truck_driving_jokes.pdf
    • https://ruzuxopamekegi.weebly.com/uploads/1/3/4/7/134748505/mawurafaripa-wulupoterimam-senimuvasiledu-rujulurur.pdf
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/rurade.pdf
    • http://pestore.pro/beautiful_disaster_clothing_amazonktj4v.pdf
    • https://cdn.sqhk.co/supuzeren/XijczSV/new_bhojpuri_song_2019_bol_bam.pdf
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/8a36e333ac9e277.pdf
    • https://cdn.sqhk.co/futevanu/gzkjbaO/kart_racer_movie_free.pdf
    • http://rocketdocs.us/japan_tsunami_2004_informatione6o4b.pdf
    • http://frasqen.online/toeic_test_2019wm0w9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/aa8e03c2-d089-47b2-a254-fb802e292b54/8989441836.pdf
    • https://uploads.strikinglycdn.com/files/c42e622c-a2e2-455d-9126-752b4e4cfd89/aroma_6_cup_rice_cooker_target.pdf
    • http://wilaroxu.atwebpages.com/koxufinememaleperivi.pdf
    • https://uploads.strikinglycdn.com/files/7edf3dad-3cfd-4bee-96d0-70276ab20ff0/45985718447.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f912.bin
561036f7e54322e7987ddc3fdf05db2665f80dd3ec82450c246788b6bd2d0c66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 4912 bytes
font_01_sfnt_off000109a7.bin
6cce03843dfc3a2b3c046d7f809d66d30be56c3169f676a4fb850f04c42fa5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A7 10884 bytes
font_02_sfnt_off00012ec2.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 4324 bytes

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