Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df98a4e7ea5886f…

MALICIOUS

PDF

134.3 KB Created: 2021-12-03 20:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: 8b1ffc204e28853579d983ac97927424 SHA-1: a51f4f972889e0f6b8ff9cb5668bc4a7e9e94fb1 SHA-256: 6df98a4e7ea5886ff35612a1e5be0378f83b22aeed024aac60cb1a9d8e0c7a91
364 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR business lure with obfuscated text critical PDF_QR_BUSINESS_LURE_OBFUSCATED_TEXT
    PDF contains a QR-like image and business-process scan instructions that only match after removing invisible Unicode control characters. This indicates deliberate text obfuscation in a QR phishing lure rather than a normal QR code.
  • 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.
  • QR-code business verification phishing lure high PDF_QR_PHISHING_LURE
    PDF contains a QR-like image and visible text instructing the recipient to scan or use a QR code for verification, HR, payroll, policy, email, signature, or similar business-process activity. This is a high-signal quishing pattern even when the PDF has no active JavaScript or URI action.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://radmangroup-ye.com/rgfiles/file/53707332993.pdf In PDF document text
    • http://kco.su/userfiles/file/zolifuf.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/fobokamupigegemoled.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/58373095017.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/38284973780.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-10-6/20211006225815688753.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/61808771449.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109131705309266.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/suzepewolomuruturem.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/vidalaneseror.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/3772213454.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/safutaze.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16153cccf2fd60---wagamajatoledisorolizide.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/36862887556.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/49837571073.pdfIn PDF document text
    • http://ambulatorioveterinariovianello.eu/userfiles/files/firabedapokaturaraso.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/7893678843.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/26090316246.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20211127_214332.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/23929185527.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/55906914699.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/36373005721.pdfIn PDF document text
    • https://huntic.ru/uplcv?utm_term=fcc+id+elvat5g+instructionsIn 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_off0001aab5.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0001aab5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAB5 18476 bytes
SHA-256: 98d608a21ff8f299317edfc8fc7e9e3e409c7e687ed33b7d8260c0840bdfa89f
font_01_sfnt_off0001da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA95 10824 bytes
SHA-256: b8e7151fa8232fe5665f63885fd53cfd80cfa39f2592dcb69fa49b249a8cf4d1
font_02_sfnt_off0001f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F38B 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336