Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8622f3716a6c5c5…

MALICIOUS

PDF

95.5 KB Created: 2021-03-16 02:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa1f58f05eb73226a9eb406b5b9597d2 SHA-1: 904697ae69fa0c0940c800f080838de72177cbd0 SHA-256: d8622f3716a6c5c5c23995a4641679df48590766b0d59ba92e6de5b6d7cd5833
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to unknown or potentially malicious domains, indicating a link farm designed to host phishing or malware content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/wix?keyword=angle+relationships+worksheet+pdf
    • http://megatorg.ru/data_analysis_excel_macbook_proyam3l.pdf
    • https://cdn.sqhk.co/bulixanejad/gfPs0je/disable_applocker_windows_10_gpo.pdf
    • http://xexevigaje.22web.org/vetomevota.pdf
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/bigikarugagefa_tosikepun_vumiv_detifovagawamo.pdf
    • https://cdn.sqhk.co/jagugide/5hbNFjc/craftsman_2020_game.pdf
    • https://femuxejafedanib.weebly.com/uploads/1/3/2/7/132740958/8410503.pdf
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/renizapiwuxelug-ziweti-pisef-wesopuvu.pdf
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/3401271.pdf
    • http://vezerfa.xyz/25628802948kfuns.pdf
    • http://circulyarkadigital.xyz/vazuku1c4a.pdf
    • https://xitititoludazo.weebly.com/uploads/1/3/5/9/135987602/11a96b.pdf
    • http://azakalaza5.xyz/vumoweromofelulefedagisi06ktk.pdf
    • https://cdn.sqhk.co/nuduniguwufo/iPtDvhL/onedrive_auto_sign_in_not_working.pdf
    • http://dutov.org/how_to_turn_off_car_alarm_without_remote_subarufru4c.pdf
    • https://cdn.sqhk.co/madufuxenuw/jdibjdQ/gatemotovixo.pdf
    • https://cdn.sqhk.co/jaselavujuwi/9G6D3TI/43076962459.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_0c66ee017dda4c32be7756620121bb3a.pdf?index=true
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_781e05cd54a4445989bbd920a5cdece8.pdf?index=true
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_d6de3f46d7724fbe953e3e3a8b53f803.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ebbf0da-684f-43e0-a4b3-3bd2edb4faa0/english_to_spanish_dictionary_with_pronunciation_free_download.pdf
    • https://uploads.strikinglycdn.com/files/c006e010-9472-448a-86c4-d84658855879/61233745683.pdf
    • https://uploads.strikinglycdn.com/files/3c2ff7fd-1aa4-4d4e-bf81-b41d847555e2/telewezivifa.pdf
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_65eeafa12ee54007982ac8fc21f2f499.pdf?index=true
    • http://gugidopesuv.rf.gd/77572296581.pdf
    • http://finabupotokuko.epizy.com/ford_explorer_2014_reviews_consumer_reports.pdf
    • https://uploads.strikinglycdn.com/files/1a7bf0fe-2457-4109-824d-130ea9c4f0d4/ue_boom_speaker_sale_nz.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001138d.bin
b56e44a968f246fdada724ceb2fc79b5886f2a8c3ca64efa6aa23516d49574b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1138D 3040 bytes
font_01_sfnt_off00011e7a.bin
7cce84dc9da6b5f7266b419865eeb1b6586d0c77cabdb8a4fb20e5eb8e5fc430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 5448 bytes
font_02_sfnt_off00013114.bin
f1a59f9c1ee2de34fdd65bfd01a620a5f6d5d3c4d64fef512d9d38022a21b49e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 11496 bytes
font_03_sfnt_off00015873.bin
4365a5749b5f105a47f27bd2e0a557139cea34e0d2a8339000a91a9740b0ddb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15873 16188 bytes

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