Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a17e7986230bf2c…

MALICIOUS

PDF

96.5 KB Created: 2021-06-27 05:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e75d4599200e5c5307a7b1ba57834a7 SHA-1: ee891a5a6614ac121186939ab991dc565edfe3a5 SHA-256: 8a17e7986230bf2c61357d4fe59259cb5f70df07dc4c5f1063641bafd41835a1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c689e518e66---52048178467.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1af8b991e---daderupizelove.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17ed494e2d---nidirijasite.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d3027cbe0fc80388c298929f0461ecca/55684465359.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ba24ef5e7---61660424878.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34c69cb3c---89196265240.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da49573192---37841295101.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/nejodaniwekujuwadifugupo.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/zegosuwi.pdf
    • http://eds-muhendislik.net/ckfinder/userfiles/files/xatanedonefidad.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7b91c6cde---xevuvajedanesologamut.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844d22ad033---lirofemototusomop.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af7da1838f---dosuzijobinupewuvozuzefow.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e6rgo4bnap3h81hb6hef91ffr3/31586644748.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160850792c2335---bejufoviw.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2dc7175e---javebexejumolovedef.pdf
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/vonavobusufeboxeluka.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d77251f10---sazax.pdf
    • http://adabaskimerkezi.com/upload/file/miditewomatavufevozovi.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5c691b042---fotetozefo.pdf
    • http://xahscw.com/userfiles/file/1577160649.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094d9c717d4e---jodajunawariva.pdf
    • http://phpirateboosters.com/clients/867602/File/luzinezexisunufa.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702aa6a5190---borixekarejopusipikadatug.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=seventh+day+bible
    • 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_off00011748.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11748 16792 bytes
font_01_sfnt_off00012f5a.bin
a239389ad0b02ea668f905d62620e2ad98fedcdedcdb8bd44b7de5b509684c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5A 17804 bytes
font_02_sfnt_off00015dae.bin
d621b55aacbd0e2b43aaaafd1be82c7ee36dff3543b7095cf250ac486592d4da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAE 10352 bytes

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