Malicious PDF — malware analysis report

Static analysis result for SHA-256 46094333f3183e37…

MALICIOUS

PDF

82.1 KB Created: 2020-11-25 17:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5ecd7b30638b91ab57dc41f0d96c8096 SHA-1: b0c26b747be5f6bfd0b7020a0d3b8b01899f1e03 SHA-256: 46094333f3183e37b529a474c18251aa082beee1dd694e539c295d54f36d648a
156 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is part of a link farm and is flagged as malicious by ML classifiers and ClamAV. The document body, though partially corrupted, suggests a lure for free music downloads. The embedded URL and the linked PDF from a Weebly subdomain are highly suspicious and likely serve as the initial point of contact for malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafficel.ru/123?utm_term=descargar+musica+gratis+online+sin+registrarse+sin+virus PDF link annotation
    • https://rixemeja.weebly.com/uploads/1/3/4/7/134711448/bexejagijosiv-kemunuwaza-naneroxusefam.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/lorubavevotu.pdfIn PDF document text
    • https://migaxodilex.weebly.com/uploads/1/3/4/8/134852634/b99eb.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/tigovatolis/excel_annual_leave_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fac466-3ff8-4237-8843-cabf9005434d/pinufikevisiwuferopuxomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41de7c65-1f26-4ee4-88be-7a9377687088/13846566146.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/rd_post_office_form.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/words_that_start_with_hai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd49169e-7116-4a6b-9826-df54b4c2ebfe/89013822275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ead2f34-b256-4319-bcb4-295373d2ea53/gixixeg.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/62429991783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86c91e4-19bd-4a64-95f8-c5d2835e8561/borderlands_tps_athena_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/766673fd-40c5-4146-ba0c-2f842d34f297/40019321417.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/ludoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528af38d-a677-4442-bd39-377bee3a708a/gemufuzefuso.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC767 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 5180 bytes
SHA-256: 7dbecc4112c232e2e303096fcf13a1b8cbdea7ebcf01026516fe949ce8ed59a4
font_02_sfnt_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 4912 bytes
SHA-256: 07823b83649bbe135f07726d6de694c4420b5b8bc1a9836093295ceaab18dfb2
font_03_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 11628 bytes
SHA-256: 30cb7b647749df0e02a22df85db0c5497bbfde2b84c2cd7a5e2e84345a069bf7
font_04_sfnt_off000122f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 16168 bytes
SHA-256: 8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9

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