Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95ffc901bd9bc82…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 09:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f26179b4270cb12f9c6665b3e06abd5f SHA-1: ecd02881bd9049658761cc52e0558dbfafc2c81a SHA-256: d95ffc901bd9bc828ed875eedf13f211308ad7ee585db97c4b55c7a6d30b67ff
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, suggesting it's designed to evade static analysis rather than convey information to a user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drrajanmahtani.com/userfiles/files/bajigumivatugusuloma.pdf In PDF document text
    • http://mbcasc.net/imgs/file/dupudejudaluxoxoxumiva.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/31a3e3dd9b080d9336e99ed089f18ca9/80302212721.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/24979826510.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/lru4ou2vsg5ub4clp5841fqf01/23332225195.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pevc34chmha6giucvua7drber3/32313156836.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/86404026064.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/jifopisobo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160740449b59c9---33887855897.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7c69c30e77b0a749aaab9b668498538c/mapilenizewejafikuwedame.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/kk5qv7mcdb4oldc7msomls4jio/rifulevijozavupela.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/8431976415.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b82f080b3---29642032301.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/cfb20d82d95976b182d222bc871abc5b/27620330291.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c965d64e0a7---mikavofiba.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf6d22070---7010101948.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a984a22fc---xutosodotizawatiki.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/87731965888.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/vnu78kkq30bmhv9g52nj14g20v/24048560767.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/3fd14f186c084495c077dd363e475bd3/87018422619.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/reoanhfvnjmpehd74jhgluvgpf/53622852208.pdfIn PDF document text
    • https://avvocatoboretti.it/file/53380134860.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a2a2a0ec6---wovivutewana.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a57b32c279---petasejilefinemoneforuz.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/pumixufavesuzavupuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=conform+used+in+a+sentencePDF link annotation
    • 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_off0000ee43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 17648 bytes
SHA-256: 32106481b2bece23f4f152368ec7591d2eac4e06435a1ad93c5aec954e3bf0af
font_02_sfnt_off00013368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13368 10724 bytes
SHA-256: 7a4a6f27f45a4a6cf5dd1396270218382c46afee2245f39490be8d70c0c77d9d