Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45683dea90879a7…

MALICIOUS

PDF

86.5 KB Created: 2021-06-27 21:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9549e57ef4421c48466e8a34b2090804 SHA-1: 5e108723b2df97a3186fb879ca96678e60f21f1d SHA-256: d45683dea90879a78d905a08670163b08673a806ea1980148c7995b022519b59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to compromised WordPress sites, disguised as download links for software utilities, which likely serve as a lure for phishing or malware distribution. No scripts were extracted, but the presence of link farms and the overall detection suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://irlanc.ru/uplcv?utm_term=download+kutools+for+excel+with+crack PDF link annotation
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c0851a200e7---gaguxakomuraximaguze.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/rubobowopemop.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ea84ef90e---93887259778.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/mogew.pdfIn PDF document text
    • http://texmet.pl/userimages/file/35266417624.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/kiborugup.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/98060799604.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/1f6c857a87c541e3101dfc751af1752c/lozavowukizasiwu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cec278b3809c01a0c72a97803c7fb273/wogur.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f5553c3b9---girive.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b60542a1fe3---17075343530.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/6e724db357b9d77e959fd5debd3ecb6d/jotixafunotutudoberuwu.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/70663982033.pdfIn PDF document text
    • http://119pump.net/d/files/tixitorazupupopasorotuk.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ckft52rei6l8bmhu425ghkro85/43825675638.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ea25d3a3a---marawujerufelaro.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/1e5066208038a64fdca6ada9799bb5b6/12398270709.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/lefopazelovi.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/67115658303.pdfIn PDF document text
    • http://www.celso.org/download/susajisiwoluteba.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE094 28276 bytes
SHA-256: 7326dd1c72d6230a0be72b80ff9cb8ce5cc9cf95d6a0c630229ae9f749f07783
font_01_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 10956 bytes
SHA-256: 054bbef1e7cb6e02967191d640f985e2df28c9605ab3b0735a8bff5b53e818ce
font_02_sfnt_off00013327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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