Malicious PDF — malware analysis report

Static analysis result for SHA-256 43241a7346350096…

MALICIOUS

PDF

89.2 KB Created: 2020-12-31 16:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ac8d6b180164c70ee2807cdfde8b292b SHA-1: 9495494dc41bad8814efb663d55b5443b14d443b SHA-256: 43241a734635009646c5a295d9ca3bc859e4d89c7fae5cd7d9e721b5eedebb2e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=night+fighter+ww2+dogfight+apk', which is disguised as a game download. This, combined with ML classification and ClamAV detection, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=night+fighter+ww2+dogfight+apk In PDF document text
    • https://cdn.sqhk.co/jogepirar/dibjbrb/gikatarurel.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/hhchhjb/x-_games_12_bmx_boy_s_bike_green.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/gih2rhi/ice_cream_truck_for_sale_michigan.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebe2d70-e328-4f62-aea5-67ebd55bd3dd/zegajip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7e1a49-88df-4a2c-8e57-65d9c61e7800/kijunokebenobakemalo.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/nosb_full_form_indian_railway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3efe0cc-58d1-44ba-9787-872db1662f18/noveredonapomimobodedik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc62d81a-fd42-4a1f-84c8-a6c66ad4aa3f/kajaxobakobabavukosinaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45ff678-cf13-4641-a4dc-ec6e196db15d/a_treatise_on_the_family_enlarged_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5366cb-7896-4706-bb1d-3cca9f86e72d/dipujeresosogafofak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d23df79-e54b-4a8c-87a2-198460166f3f/lixopakudekuxaduwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2263a0-684c-431c-ad94-55e7a07f0271/los_liones_trail.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://www.gnu.org/licenses/gpl.htmlIn 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
stream_004_off0000ed4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xED4A 14748 bytes
SHA-256: 477630f434f95772c2a9e2ca91889a0ec3dae7360a3a800591ea75933540aac6
font_00_sfnt_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 5352 bytes
SHA-256: f6a845cb20242740de441deca2acccec5fb096eedeb28888d60c606ca179ea7b
font_02_sfnt_off000116a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A4 11720 bytes
SHA-256: 6f36538aae3209688ba3a2f88e848f3134b6c64ad4de189037bec0fadecf3abe
font_03_sfnt_off00013c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5D 17756 bytes
SHA-256: 51f78d70da3ad2edc7219f15b074c6f4a3aac4589461a6f383dca40f765254e7

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