Malicious PDF — malware analysis report

Static analysis result for SHA-256 875203904cc6cfbe…

MALICIOUS

PDF

81.9 KB Created: 2021-10-07 01:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-04
MD5: 41d5b49601a383edbc527392e6c1206a SHA-1: 33bd13c823a58fce3fb1c650890d847aaa8d39a0 SHA-256: 875203904cc6cfbe778e906934c20fd2e71c0aea7f0ea0de43acdb2d79f2b163
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=hawaii+library+system In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/9c6d9adc06e14c598aefdf510ad977b5/63922153344.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/vojupafenuvar.pdfIn PDF document text
    • http://eternoohydro.com/d/files/tuwibunaralatidemitizisaj.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/kekiwu.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/tabododexuninagaje.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/29322421664.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/vajotaridonanikokevexun.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/32508897550.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/xolewag.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/poduju.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/wodosetapideduwad.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/movupukirile.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/47649535139.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/91830048099.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/68206193011.pdfPDF link annotation
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/08509e79b5616b9bb6bca9255ff3fd07/mizotogigi.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/xenexexedelow.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/vimusumasunazasukuz.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/dee5291eac3e883a69b4dc263fddede6/73369106375.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/nezevuwefenedikegibosokat.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/ripugororunifilulit.pdfIn PDF document text
    • https://ripedesign.com/app/webroot/files/fckeditor/file/87375460072.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/e27393bb6963ee21c9d8e45ac8b1bf8d/93092212733.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/xukavapazot.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 extracted file (font_00_sfnt_off0000d5de.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d5de.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 20084 bytes
SHA-256: 56e7969a2b034c29100df96554adb02530c30b2e1302c1d9065ff615bc78b31f
font_01_sfnt_off00010a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 10376 bytes
SHA-256: 7dfa2e7fb8e0981c273d6a8938e9edef6948a11ff12b7d02ac2baadae84ca56d
font_02_sfnt_off00012196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1