Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c42030785a0ef2e…

MALICIOUS

PDF

91.8 KB Created: 2021-09-04 18:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b25ed17846a3c4fcdd07bc660dbeabbc SHA-1: 82ae11c1382ca82d70d62b4b8e36839cb4f0963b SHA-256: 2c42030785a0ef2e00c85d5e5a338982c46692c5af0fcea24f0f5614a5e68488
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs that point to external websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary function seems to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://chcial.ru/uplcv?utm_term=hold+my+hand+novel+download+pdf PDF link annotation
    • https://lentes123.com/aym_image/files/97204515711.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/netibifumabu.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4249df457---jibujifawawojoxe.pdfIn PDF document text
    • http://ctm.it/userfiles/file/93462068755.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/087ee2c0547c677f9e9e5e4fd16e5d95/39653301448.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c333b8b32d2---41796041873.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/41573528119.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/lumemoxawu.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16082eecc7ecb0---24202270281.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/wejiw.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b015c9fa67---bileguburopovopew.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/okbilds7ckf11moj4c45q245dh/rakifuzoxevulolozetukid.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/22128659194.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/metegebeg.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/3b6116f917dc47cc21174237f4ff776a/49461824213.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//tabusikufetubobigi.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/zikibelodudoxow.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/155j8iuji3auenkio3p5d7gbsv/mudegumeribufugajekixitat.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f7efcfc12---17972657457.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9f5f265437ef536299f47212cfe11753/66321954819.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/vagofigedisinojijikewuwi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a51d807b36---sepelatelogota.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/paxufewipigumudusutit.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_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 10564 bytes
SHA-256: 824f0e150e6f60acbd853d2c0af085cf9ec17218fd3018c02274b59a94f07423
font_01_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 19384 bytes
SHA-256: c854c840e6059385a672e7f9b40e0ed1be62979df73db5f5cfa4963c807b838a
font_02_sfnt_off00014748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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