Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ccaf3aee1e8ec5…

MALICIOUS

PDF

90.6 KB Created: 2021-07-03 02:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8bfe353dcc85659a6504851d0cbaaec4 SHA-1: db449ac172fbf7361920b8075dbe0c3f4ce58061 SHA-256: f4ccaf3aee1e8ec5c864567ecc7804f79543724a8a1e032fa694bd77051e07d9
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://abofahed.com/userfiles/file/sanajitewalora.pdf In PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/gorobasuwujajej.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/884eb3e78425ecd5787f389be3ee0e3f/zuwevipafisawusufuzig.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/507fe3097c97d9cca366b72f5d5c1eee/nibefewajujaso.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/oq5juhvgc9pre5b86ipunn0ig0/sozaxirumovisij.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca1311071c---mabamalov.pdfIn PDF document text
    • http://qa-whg.net/upload/files/remazukagokurixoreti.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46e468c46f---36692634485.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/kmoer1u3miepkpnrq5q9dko4li/77752246754.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210620140544.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/75514968029.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/fe637e59192c4a992ae1f2e89e3e2452/wurarowaku.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf1eee878---77933981297.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/valejubufavetubefejanapur.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893ea604c38---13820572698.pdfIn PDF document text
    • http://cookbox.nl/app/webroot/files/userfiles/files/41059502925.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/6c71a4579fe36d791b229dafbbad724c/pidenexegelowu.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/modaxufimemefelog.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/tewakixujotosezof.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/126044829e6bf7b3cbffd775d5c9fded/sobetufebokok.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/sonanoxutubodokumenape.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/97ad95e1495ab8ef94581ba6badec9fa/48484214076.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c507bb438fe---potavududobekovawi.pdfIn PDF document text
    • https://trongtrucsolution.com/uploads/files/89324529695.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8df5b5c84---36481654626.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e1212e2ff---zeverovalijiwemoki.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba94c5eafb---4329819529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=wow+fire+mage+pve+rotationPDF 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_off0000ff61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 10632 bytes
SHA-256: e32674a685eda82ac372c2848664aa4e9ca15b540194500c918badc4c43138d9
font_02_sfnt_off00012fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD6 17344 bytes
SHA-256: 2e2ebb566a9f08a6d147bbe445dc6c9e0742d5746e1d3805cbb5e3a530ef8598

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