Malicious PDF — malware analysis report

Static analysis result for SHA-256 04df7e45749009db…

MALICIOUS

PDF

90.7 KB Created: 2021-03-20 19:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8b819c435d98b8b056494a606af7d9d SHA-1: 2721e18dfd723cbbad1301b2e70980990175dcc0 SHA-256: 04df7e45749009db7c235bd352796f97242af0fb47f9bf8cf9edfbb580c57753
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://dafemum.ru/award?keyword=physical+science+grade+10+chemistry+pdf', is presented as a search result, likely to deceive users into clicking it. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/award?keyword=physical+science+grade+10+chemistry+pdf
    • https://zirodamabesad.weebly.com/uploads/1/3/0/7/130740068/6006840.pdf
    • https://vexuzunudupugez.weebly.com/uploads/1/3/0/7/130740013/6f0c29.pdf
    • https://kuvomudoriri.weebly.com/uploads/1/3/1/4/131406544/jemivigupuxuvo-pizip-xaxoxulevamal.pdf
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/7963857.pdf
    • http://wuwulobuxalajut.iblogger.org/43219509360.pdf
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/rowajowamuzel_fozoj_risesil_xebudopigo.pdf
    • http://sibasijiv.22web.org/how_do_i_reset_my_fisher_and_paykel_dish_drawer.pdf
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/479f8273f74f7b6.pdf
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/848671.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tinajabizoreguf/drummond_island_weather_report.pdf
    • http://gevegure.rf.gd/beach_buggy_racing_free_for_windows.pdf
    • https://uploads.strikinglycdn.com/files/05ee4d81-15c4-462f-b585-b3ab97b22bd1/hp_printer_has_yellow_triangle_exclamation.pdf
    • http://soreras.epizy.com/88488102473.pdf
    • http://dixisafujanen.rf.gd/domestic_violence_mandatory_reporting_nt.pdf
    • https://uploads.strikinglycdn.com/files/39379327-b79b-4b8b-9f6f-f11ca5b456d6/us_army_uniform_for_sale.pdf
    • http://zabesawafusoxa.rf.gd/probability_sampling_advantages_and_disadvantages.pdf
    • http://savikolapuxol.rf.gd/material_requirements_planning_book.pdf
    • http://bulujulu.rf.gd/i_robot_2004_movie_review.pdf
    • https://s3.amazonaws.com/kezemiradigu/27114844529.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf6.bin
d1b957da1668677e8908c8c6c4fd4ab57b50129cd4c5ae0dd78ed03afb6ae96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 1584 bytes
font_01_sfnt_off0000f3cd.bin
9fa3dce57ef706ba62349a05953a7650058401ad51d6146666103162ed2559cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 3728 bytes
font_02_sfnt_off0001010e.bin
d115affa532507b43def94220c23a179dab6edf847e533b3f01365322e6681cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 5868 bytes
font_03_sfnt_off000114ef.bin
0a09e5f5d4f47b9a62f7041e36cd202bd3629a3d7ac2d768a8681939481f74ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114EF 14952 bytes
font_04_sfnt_off00014553.bin
1bc1e1b2fd8a5b71a000fac0d9d70660bb69f3e02dcb46ec492264b26e0f2a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14553 16516 bytes

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