Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fc8f53e9ed5b5e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 15:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 01daf08c2e68acf3a37e2d334515e475 SHA-1: 940723c0a104b383e942a8636019d5de8ebfe10d SHA-256: 01fc8f53e9ed5b5e96dbdfa5a9a98c8d54a5464e6b84bc2d967cbff9dd17edbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://infrive.ru/uplcv?utm_term=converter+para+jpg+pdf PDF link annotation
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/09d3c68bcc20b1e0bea6541c7edc2250/78739677968.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/worusutaxiduxafa.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/42252913016.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/gemilukodoxutisosof.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/96466925060.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078297054fc3---79374151186.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c75e136f---guzat.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/47736776641.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/08/files/210813010059.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125f8979edd8---bawojafegirovuj.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d7a6ace8d---5335525397.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/57456605593.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/69688679368.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/vegixobuloguverafogema.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/24156629430.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e77e59602c---kowibevotazekizaxifamipid.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/54694917435.pdfIn PDF document text
    • https://ekransamara.ru/files/67507314114.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43391695709.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa3e7bdcbc1---sorigapexugi.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/ec532ca95a0bdf1aa27c4084dc42187b/wivedigotonidugoga.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/fimigirokekimonufoniw.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/683180499.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/86187029186.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B1 17368 bytes
SHA-256: a59eed65a3a1947870dbc1310414b92846681a7873e7e767b69b1fe7a13a2154
font_01_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 10592 bytes
SHA-256: 0192e4b99e9a1432afcd32d674368819ed820232fa24d65ecb70f366b8d21410

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