Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10de7bef5359b3c…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 16:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d28972d246e2e9253970134e722f606e SHA-1: f0b044b837dbb029d7739448f7ff4876d4b9adcc SHA-256: a10de7bef5359b3c424e080f76ea895f95921be2c3fc6fc45055d7fb9e452e5f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable domains, likely serving as a link farm to distribute further malicious content. The presence of external URIs and links to compromised CMS upload storage indicates an attempt to redirect users to malicious PDFs or other payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://krisoc.ru/uplcv?utm_term=roasted+broccoli+in+air+fryer PDF link annotation
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/netazarelobapezikojon.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c8964280f05cbdb797234f60bec8e026/xobojaxebexokibin.pdfIn PDF document text
    • http://inse.us/uploads/images//files/pumedalogokizutotadevozeb.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f291a1b5---34503243200.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/514dcdc6aa03ffca730c473cea73eeb5/74747111509.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3b7fb8d1a76595d92312026c9d76543d/lofijisomux.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082601e66519---78211129696.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/65290671190.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/5514f5cabf3fb2c26a4638f07fa9b021/ninegoguza.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/faa66f6abf197ca8f7b042e60f79e2d1/62096052568.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/6342400771.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bde039dc01c---63918181950.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/94728653788.pdfIn PDF document text
    • https://whitesal.com/data/images/file/9019_20210521212618.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/jiwap.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/04b1a340cb7137d65aa8f16d8e68422e/xasipijatabekubofox.pdfIn PDF document text
    • https://coevent.ru/upload/files/28173625097.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b42ca9fc---lasese.pdfPDF link annotation
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4cdd480515d04c0d51d947064e1cebf/93295306687.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb157a832e---nefitug.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/sosimegowukupodupa.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c66b8f5bd---jidasetepifonu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c302a919962---birajofut.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/92944738377.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/a9afc895305041af7740107101f215a3/1998944077.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/zexiliforil.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/28591137538.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_off0000ecc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 17128 bytes
SHA-256: 0629ea7aa9ea5837380fb9582bfa23a23b19ecc8bcbb56a258d0f92e59f4276c
font_01_sfnt_off00011963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001317a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317A 10768 bytes
SHA-256: 6b854128e1702b1e83d0ba8fd9c502fe063c031a4f1b36b63d3ebd3c4a81e892

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