Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d850c6727cb264…

MALICIOUS

PDF

74.7 KB Created: 2021-03-22 14:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 373b9ed92efda181029e38e4622be5a5 SHA-1: 7a4e056b45329e40c8951e174f70910b30eaa22e SHA-256: 74d850c6727cb2640336b998b868fb5bd1fb417cec3e65656ecbb8f601142400
222 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier. It contains a link to a known malicious redirector at 'https://dafemum.ru/award?keyword=bahishti+zewar+urdu+pdf+download', which is likely intended to deliver a secondary payload or phish for credentials. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=bahishti+zewar+urdu+pdf+download In PDF document text
    • https://cdn.sqhk.co/waximanodif/CQjjhid/nfl_fantasy_football_draft_board.pdfIn PDF document text
    • http://vinnipoh.fun/jutolesedukudbrah.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/Pibhggh/rainway_ios_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/mojubemuwek/5S6ichj/bafupaxuzolipebuxu.pdfIn PDF document text
    • http://goromeo.club/john_deere_310_backhoe_hydraulicssr3op.pdfIn PDF document text
    • http://info-pages.ru/nadifawasuvua4ygb.pdfIn PDF document text
    • http://fonomujolatuv.22web.org/61236650863.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/vebenok/brockhampton_saturation_documentary.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/articles_of_confederation_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/61724231919.pdfIn PDF document text
    • http://wazinupizut.epizy.com/free_andy_os_offline_installer.pdfIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_ae3fc345b42d4ddcbff2f0eee9daf078.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af913b63-24ee-4479-b27e-c251b79fa9a9/texas_health_and_safety_code_573.021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaea244-8ed9-4fd7-9bce-66f251ab5fcb/38718699476.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/zadimonivilabuk.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_1d196b92a0014dbc89cfdae4ac0e8194.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 5320 bytes
SHA-256: c97a2c55aa2afd5773bdebb96179a00a49dbdaf49097f649df8e84dfe9790a4c
font_01_sfnt_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 10808 bytes
SHA-256: 4572e6c752cd2dc288c7b38feb1f1646ba21dab27bb71c3740ad70ff1b66d3d4
font_02_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 16968 bytes
SHA-256: 203d4a65089ff84c50b564208c98c0c638facfbbc7815a0290c82d9301a74734

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