Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b79006f1ca54031…

MALICIOUS

PDF

92.4 KB Created: 2021-07-01 10:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 53c0f37600bf87f5fc71c31ffbec5c3a SHA-1: b82eb38104ba4edf0f838e1174489c2ca88a8814 SHA-256: 8b79006f1ca5403137f1ad359d64e753f8f8e775a959e59465dd06b23166d910
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress upload directories. This suggests the file is designed to lure users to malicious sites or download further payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=thematic+apperception+test+pictures+with+answers+pdf PDF link annotation
    • https://vetamblj.si/ckfinder/userfiles/files/20933502484.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d8bc9ddb3b4---25863043884.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/53872715060.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/rfb1ummf87re5no97oimpt36rs/42000160789.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c6e36b498ed412cb2b79797a31646714/78558059641.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/4835e2e6b25929b4936fd47baa7862e6/70983343824.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/12534753430.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/43149411234.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a93ad363940---83168272447.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607daa126913d---vujab.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f329eee074---dezorasimunoda.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/v97n158qn41c87gjugt52eq1gf/babulasumuzefete.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/silibar.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609d362b53c55---20666400078.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/p2rn8qno0e2n0jgv7sm96at9m3/20649433886.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/pebawadonogululigajemadat.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/kesabowibigamavu.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4aaa984bd2db48ef19aaa0e29ea343f8/liginemivobu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a50ffb6edb---noxuruwidatagozuwoju.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cbc56147d---25991200090.pdfIn PDF document text
    • http://alvitraders.com/files/26479300322.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d3234a96c---12907553024.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/35782438924.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/2f73c1887795c9af93c2198633bfd822/34687031413.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 10988 bytes
SHA-256: 2d713028de9a5f67ecb201820852a99b671a82a9c1b5164e75bbb34e2529ae4b
font_01_sfnt_off000105be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BE 17176 bytes
SHA-256: 7c001cc6600fa0144521134057d7765aa1eae0e910fb12d0219f15080a4fc653
font_02_sfnt_off0001330d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1330D 16328 bytes
SHA-256: e2f2c491fd17b7fd6f029189bcb2c214e8e615ccfe4e38cd2a045887796c783f
font_03_sfnt_off00014976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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