Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceb1d1135cf02c4…

MALICIOUS

PDF

91.3 KB Created: 2021-06-25 21:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 737a8873d8f8e8704bd3c038d8bca6cb SHA-1: e6103537b2653df560d739f1a36f7d7e2442607b SHA-256: 4ceb1d1135cf02c4f603a762a0910fea65e60deee00e940e6fae16cc0ae4418b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external PDF files, many hosted on domains associated with compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/6deac539c9003e04a286c94805dc1703/xuwifowakiramose.pdf
    • http://dakmet.pl/upload/weladopazavolejo.pdf
    • https://kompaspt1.com/contents//files/93831580185.pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/nabolezulukaso.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/97fcaab1131fa307df4b90b921e9b6b0/dazojojetujojiju.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096fa5b16bc2---10868465229.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aaff8c74bc9---guvizosuror.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c15761404fb---xoxezuxupafejedotezizib.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c78fdb414---25748819449.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac0022c650---35702029690.pdf
    • http://seanmore.com/userData/board/file/jizutulobisivexowage.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/2ef8b1cf96c1290cf0c600659a86e7e1/27360402883.pdf
    • http://ty-universe.com/image/files/20210617_154245.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a86f6e153a044b28a3c423b64818f988/41173678375.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa25a5adf---29042500777.pdf
    • http://donateagift.eu/userfiles/file/vuseno.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/gm315kqjqv2l4fer4o28jhem43/xoluzudagapiwokagofogolu.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/a9os56udj62crv9ub76h7nig01/32549883680.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac39ad521fd---kufadovajozevorepowojadi.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/84bb5a5c2341462e27cd335d851ed44f/xenomadab.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bae18b746c---72556611307.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/17de87792ca143275fbb5e55f7f85962/70972351299.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073677047cf4---90688748935.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c3f44566f20bb2719423af6adda27087/kakabokojoturowifamepij.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=can+i+eat+whole+wheat+bread+on+daniel+fast
    • 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_off0000ff62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 16792 bytes
font_01_sfnt_off00011774.bin
8e5c16164f25003f29f99d7ce25828bd95a534bf2b371a746cc966976cd594bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 18084 bytes
font_02_sfnt_off000146e3.bin
aff09e3fefee5b253b850b1ddbb44d126c94c8469033bcaf11a8172a117a4b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146E3 10708 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.