Malicious PDF — malware analysis report

Static analysis result for SHA-256 93523049bf6a04f5…

MALICIOUS

PDF

83.0 KB Created: 2021-06-25 18:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bad3b48f9bc8795c1ea21deb03a42bf SHA-1: 189220c78563fa5f5ec2901ccedd0205187ddfad SHA-256: 93523049bf6a04f53eac815a961b000f696e7c925f2296a76dc88a10bc92a560
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of many external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=types+of+green+eye+color
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7c292eb68682ab3e433b197559495583/79485533347.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084e561458f1---wavomojeka.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f02ae7c04---59745842996.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a27f821924b---52114870859.pdf
    • http://renknh.com/ckupload/files/97218556502.pdf
    • http://bacviettech.vn/userfiles/file/tozafitam.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c970f3eb2eb---43873552543.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2027644daf43c4dea056f689648439e8/82986680755.pdf
    • http://akcjonariusz.com/UserFiles/file/38995471101.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6r1p2ebrtqidcl6195274tf596/69064804604.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5d198124f0b45fbda75239d80fb409ae/52397366637.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/3df10245bab64a74631c537dbefb37ed/13799283573.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/971a518124349d62cb4d3a54792d1bff/mefisinebu.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/fd814aac2602b450f98a88202cf11682/58269983738.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077dd4d84b8d---nukavutaxivojomisonigobem.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ad6e81765---razixobonelasakixasuza.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/81cc88c4558eee91d03a8348d2b11977/75121158849.pdf
    • http://cncforginghammer.com/d/files/zatugukok.pdf
    • http://tano-cable.com/d/files/basogikoluwiwijikam.pdf
    • https://rintrans.com/files/36574902198.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/d4vgkv0sqprhcrs3u48bia0ue1/riluki.pdf
    • http://ainut.fi/userfiles/file/sivexevuguselebiderigasag.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/7ea07a068986c638106eb915b11dde41/makuj.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6128996b---pozukawonuwibajumilaxujab.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://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_off0000e3be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 16792 bytes
font_01_sfnt_off0000fbd5.bin
0c1a3fa03b1e111983d4a7916bf4e0a90a0fd53f564997fbbfb2a4788783c7d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 10380 bytes
font_02_sfnt_off00011376.bin
b9776560c5f2994a5be1cea6a4e022c57e09540b030586743c9d41f9f3507499
pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 16816 bytes