Malicious PDF — malware analysis report

Static analysis result for SHA-256 98250302d1f2e1ee…

MALICIOUS

PDF

78.8 KB Created: 2021-08-19 04:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a566dbd335808ea4b0f199af5467e4e6 SHA-1: 98059c40bef1262a2a4de9a7bbbffb8e888f0ff9 SHA-256: 98250302d1f2e1ee80bc31bcd7f6bc5dbe12be361cfc952d501b10ed40181b07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to numerous URLs, some hosted on compromised CMS platforms, suggesting an effort to redirect users to malicious sites or exploit SEO vulnerabilities. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=how+to+look+up+serial+number+on+laptop PDF link annotation
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/7l0nodr3a2vsdcat3s1in0l4lu/tikuv.pdfIn PDF document text
    • http://4bx.pl/public/file/gezufamajaro.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/futup.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/84702102797.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/75802936387.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16081830116153---68600392322.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b75cb67319---zoluvegokov.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/10546266812.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/xagakofebifasufulasaka.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/5458eb44e4f7d122f71bc2d7f3e6aa6a/gowerobeg.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/vipuvuferunige.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/e29896fe66b6a5936519b0522b3cfe32/99994577263.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/72192943576.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/rugabo.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/mazadijikuxegobawexawo.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8f15cd459---tibemejuvusosexiwejazi.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/jknd3tvr0qo908flbgad628dp4/70457203633.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/minilani.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/wenoziponatov.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609422b972d49---latulegeniwu.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/kulagotupos.pdfIn PDF document text
    • http://coumert.com/images/file/gofewapape.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_off0000d2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AA 16336 bytes
SHA-256: 204307c9b702284d6f9e2152cc57b2cd37342d23200810b067ebdfd434c8dec9
font_01_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 10824 bytes
SHA-256: b7658a0bfa80104af6cddf0a5ef99990cd3d80ddf7ac0a7021de631d5608b0fe
font_02_sfnt_off000115cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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