Malicious PDF — malware analysis report

Static analysis result for SHA-256 05203244a5e5396b…

MALICIOUS

PDF

84.6 KB Created: 2021-07-02 07:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fbaf40c80bd3d12cb9a984de58f974d2 SHA-1: 0ab0f41a07347fcdeb8cae3ac69a16c4cea9046a SHA-256: 05203244a5e5396b44333202325b7a4c02b4defb27ef7f4fb439b4e823d6a505
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8m91jrhlka9i182oto9qdqqq32/25834634410.pdf In PDF document text
    • http://soles2walk.cz/data/file/73411489056.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/13270749779.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9335b3acd9---vutezuwemuwagewutidim.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4f2db38a---tovirabutademarop.pdfIn PDF document text
    • https://tavio.ru/files/file/98317621954.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/pujewilupawuxipukusujud.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/f8e2a2324161c67ce63fca5cf937c156/85998541007.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609fee29a7606---12722379248.pdfIn PDF document text
    • http://premium-h.info/files/files/xodemunapirowewukunebit.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/42300136498.pdfPDF link annotation
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609457ea06b25---remozarawiwomotubeso.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb58ee701e---folakenusirofanimakibak.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/80485913167.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/31300731956.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/bovetupabi.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/rexisunito.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24133c8548---janeneluwuwagagonugenar.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/80756533325.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989907c3689---26583110841.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d9e9e2a0226f33de6b5343e3c0e6e3c5/6098355678.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b150aa16e9c---45897745280.pdfIn PDF document text
    • http://alexandraharris.com/clients/36054/File/raximuwepokov.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/25909488210.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/56563235240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=girl+online+book+pdfPDF 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_off0000e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE939 10336 bytes
SHA-256: 0dd1ffa8d86cb4b0a47ca85c598f3d322432cc24b1f0bf3a2e524a180ef2bbb7
font_01_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 17200 bytes
SHA-256: 6402fd79ec0742c0d8c56269e27176dadd75bfaa69853ac695ffc17b82417489
font_02_sfnt_off00012d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1