Malicious PDF — malware analysis report

Static analysis result for SHA-256 01da2fffaa8648d8…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 18:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5769ac69124a8ce8977e98e6a151ded8 SHA-1: 6015a238759f8a030794b4f2b180493f6393bb67 SHA-256: 01da2fffaa8648d830710e14c99ad3af8f633cd097c690e1075c0b50b69b0268
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://garglob.ru/uplcv?utm_term=how+to+block+spam+texts+on+iphone
    • https://zlatartopalovic.rs//files/xexefotopamemewiwexorurur.pdf
    • https://amblamy.ee/upload/file/votumetumubulilugajimeket.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/p7bq0un0ifo77mjoj4t1th79s3/minokivazedixotuv.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608804c9d44bf---39910958244.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075db7799f62---ramoxatapobetutibenef.pdf
    • http://kennycojewelry.com/userfiles/files/202106/1623465420.pdf
    • https://etonbio.com/newsLetters/images/file/77365718801.pdf
    • http://groupkaishan.com/d/files/dipibovomafisapibatanaj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d00baea41---zabixorakoxufinumer.pdf
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/14320110680.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/danikiwufogikufejel.pdf
    • http://fsgpj.com/upfolder/e/files/20210608144425.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/256025ba94f03489418d1102943ee223/vefuxanuxositigegigiva.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/1r51177tuedh11jf19jgea68l4/pivujomuxibu.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d822fa8bcb2---33745126783.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbeee96299---60488545046.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c4032e682---75598519832.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/74pns3ve9cac0dbtdr3isjg1t7/81832075999.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/0eea39d133acf6941dae6b7d32070178/29137999872.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a439423578---94351036328.pdf
    • http://stoewebdesign.no/userfiles/file/webevuvijimanedo.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b388b830fe3---tojozeni.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_off0000ebbd.bin
1d7aab486910f4be206c42d49f96d419913709a68f0af68a1730670361e00888
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 10948 bytes
font_01_sfnt_off000104c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 16792 bytes
font_02_sfnt_off00011cd9.bin
7850bb6ca38b5c033dedf4d98e775b211fb82398dd64f10ce00e3ebb9806f00e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD9 17724 bytes