Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62d41ae7eb10a9c…

MALICIOUS

PDF

106.8 KB Created: 2021-06-29 01:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 63d12d74f2097a5c4fbbc9d45ce0ac11 SHA-1: 7b8eb626de96b29754eb0a0e8dbc2ec083854954 SHA-256: c62d41ae7eb10a9c11a99b68224038532dab9dcce6683a6858105e46751a4f79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting domains. These links likely serve to distribute further malware or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/75102336fb656526a2a303cd125418cf/kuvafufutiralit.pdf In PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dda1bd7b5---16623267763.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160770755cd115---zawotikivuvaluzoxidig.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2819bd22da---kamuzomekaxefijeg.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/7627399605.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/df7b919f2a20f385e749b2388df9b0a9/68168453259.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/24062042905.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/28250832704.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c613f3003---42761303694.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/75494092010.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/godatelimir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab989dbd062---64522410739.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/dekerakanefa.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/47207795983.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/xiwawije.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608432851f0b0---vegigulixoporobexepe.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/9cjurrb61hsjgu44p2un896aub/kixiwojibe.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67cb6d067---4741289909.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/bb6f62c02d39cf22ecd282eb4b7a87f6/wudorefibesavud.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/e9de91b911f9e54444da3f88557ed704/siratefirejamejoroki.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8cebe9483ee928840a4ac09301b7757f/girifonegamonepamixapogar.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b268f7d3217---82232796285.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d69d66ac9230936500a3d6f12ee83001/kelejifupuza.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/2765s71ki00v1k0lrku9bf6vdm/71441921537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=forex+cargo+deals+trackingPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C68 18596 bytes
SHA-256: 0b83b380b0cf2bc233dc39853e8ee841134a85c75bed10918b7edc8c23aec705
font_01_sfnt_off00016d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001857c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1857C 10716 bytes
SHA-256: 0efda4dae1c2862e52769833165a88842ef23857c7ff73fc4300fa38388d5e9a