Malicious PDF — malware analysis report

Static analysis result for SHA-256 0223bad2408b021b…

MALICIOUS

PDF

96.8 KB Created: 2021-06-01 08:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ca76c6252c18317740fdf4698811b5d SHA-1: 10eb0d7fd49f51bafdd0863933fdea0564f188a9 SHA-256: 0223bad2408b021bb0cf5caf75cbce4601b3c9b09fe6be19e76db9fe6b98b439
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a significant number of external links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://coretry.ru/pbw?utm_term=fatalities+mortal+kombat+trilogy+android+apk
    • https://fonomirul.weebly.com/uploads/1/3/4/3/134336784/fukamozavip_famixo.pdf
    • https://modatuna.weebly.com/uploads/1/3/7/5/137509789/6723849.pdf
    • https://puzalanenezow.weebly.com/uploads/1/3/4/6/134693659/nedomo_muxezo_rizejefomox.pdf
    • https://zebilukirun.weebly.com/uploads/1/3/5/3/135306511/fdd858310920.pdf
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/9129c8d30244.pdf
    • https://vevavosabiwebe.weebly.com/uploads/1/3/4/3/134349804/tigifawulanosu.pdf
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/bac95.pdf
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/207c37394f16d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b30c2ba9-e4ee-4804-8679-acf35cf510fd/66445511971.pdf
    • https://uploads.strikinglycdn.com/files/beff18b1-e46e-4190-a939-01a2e97cc983/tiseme.pdf
    • http://negaboxa.pbworks.com/w/file/fetch/144447807/61760470797.pdf
    • https://uploads.strikinglycdn.com/files/795d6bfa-c6f5-4ed4-a645-d4d7819cc1e3/76458603870.pdf
    • https://uploads.strikinglycdn.com/files/f6e8dc24-9d65-42df-899c-5a0fe8f02430/sermn_sobre_el_carcelero_de_filipos.pdf
    • http://barumena.pbworks.com/w/file/fetch/144444306/7880733051.pdf
    • http://lakebimutep.pbworks.com/w/file/fetch/144427338/how_to_make_a_shortcut_run_as_administrator.pdf
    • https://uploads.strikinglycdn.com/files/0cc8efe3-ec42-4e47-bad5-f2a6575e8e04/can_you_find_facebook_friends_on_snapchat.pdf
    • https://uploads.strikinglycdn.com/files/c0a5e955-8dd7-4588-9d4f-d6e604646737/cisco_dpc3825_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/0aacde96-d499-42aa-965d-ba0d18c9a0d3/jolly_phonics_group_4_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/4ef05704-b79e-486c-88c5-f979e6cac7ba/26900290181.pdf
    • https://uploads.strikinglycdn.com/files/fe784672-0332-480c-8672-05f25fc14834/fojewuli.pdf
    • https://uploads.strikinglycdn.com/files/e200105f-885c-47ba-8c36-eb90d858a858/abiotic_and_biotic_factors_worksheet_answer_key.pdf
    • http://xedidovetaw.pbworks.com/f/kiferadavoduwudem.pdf
    • https://uploads.strikinglycdn.com/files/8a2f2fa1-ff26-4351-93c3-9c1ab5d99f55/44715333767.pdf
    • http://pokuwatosat.pbworks.com/f/28297518654.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_off00011a05.bin
0dd2b51e86486ffb7a2042dae26a1e983120dbd8537bb4250bb57904c35bb32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 5540 bytes
font_01_sfnt_off00012cc3.bin
4c8f486e7667b93d19cfa2fd4ac6043aacff056ae86d63fbaec68b7348b952ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 1948 bytes
font_02_sfnt_off0001361a.bin
77589f7f75d679d222f89497f4601ac3fd5c5a2d3bfbad503ed26b4c5774e8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1361A 12044 bytes
font_03_sfnt_off00015de7.bin
5213d6b72c99d15e62698279fcc56bf0147c781a77b357d678997cd0346b2bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE7 16096 bytes

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