Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd910bf5470849f2…

MALICIOUS

PDF

79.3 KB Created: 2021-03-16 08:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf4e2ae109adade56c07b486a4fd91fd SHA-1: be6eae87db5572fad1e17e3aaf604dbda0c3d28f SHA-256: cd910bf5470849f23c7b544c397e2ab210797ce182dafe432fb4922242b6ab72
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or SEO abuse tactic to distribute further payloads. The embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/wix?keyword=keyman+the+hand+of+judgement
    • http://idealicaitaly-ufficiale.site/intercambios_virtuales._combp8eb.pdf
    • http://mestorating.ru/48647956197p7cet.pdf
    • http://joxezorov.mywebcommunity.org/rizasodosiluxujitowufi.pdf
    • http://xufelaketodo.getenjoyment.net/dan_brown_inferno_final.pdf
    • http://winoraama.website/sevodilulotevudoama.pdf
    • http://tazizinujumijoj.mywebcommunity.org/best_comic_books_for_13_year_olds.pdf
    • http://coolvdomaion.online/how_to_sit_thich_nhat_hanhwt787.pdf
    • http://life-news.tech/weather_report_bilaspur_yamunanagard1xzq.pdf
    • http://bathforlegs.xyz/gewegepnt43f.pdf
    • http://lamejix.scienceontheweb.net/pafebesuvix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gomaxod/vaganop.pdf
    • http://pabotojixupi.atwebpages.com/food_safety_definition.pdf
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_8f4cc71c0c7d49a6b1639a13603838bc.pdf?index=true
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_3dc81c1e124448ec862ad86e7e64151a.pdf?index=true
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_c94d196aabff4da19683110b7c3c3ad1.pdf?index=true
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_bbc59731b7194bceb1984c051abed73c.pdf?index=true
    • https://16564176-4c62-44d7-82e3-1dea6b832d73.filesusr.com/ugd/5e57cf_0804d9d8543b478baa4e18a37336962a.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_bba5d65901a04945a5a2d849ef5ffc36.pdf?index=true
    • https://s3.amazonaws.com/gonima/visotutaminikikemaduse.pdf
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_bce66354adb648c4a07dcb449449fb43.pdf?index=true
    • https://s3.amazonaws.com/xidulumexi/warframe_harrow_eidolon_guide.pdf
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_ac191b7f55c0473cb52bb53e79083692.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e422.bin
fe9232d237bac50e4d0b8f0485c7c7da9babb55ffe35edafd39f5625574698df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5164 bytes
font_01_sfnt_off0000f5a9.bin
6b1861f1bf031b9b37433c5b1edbf74b163d43644a553428bf98e203270df288		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10316 bytes
font_02_sfnt_off00011926.bin
dc81cd4a696a878a4fbbde3493283acaa0ebb1b6d8b911827813da393fc73cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 16172 bytes

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