Malicious PDF — malware analysis report

Static analysis result for SHA-256 6313a0772eb35b4d…

MALICIOUS

PDF

68.4 KB Created: 2021-09-26 22:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: b7f4b96561ed050a829554a0f8d294bb SHA-1: da0dce38427939e7bdf9a4d7ab38fe1425d68d29 SHA-256: 6313a0772eb35b4d69383f0e89669f016be222c5b8c7ce9dc0714ce4df1f2dba
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts for a link farm, suggesting an attempt to obscure the malicious intent or distribute the risk. The presence of a 'utm_term' parameter in one of the URLs suggests a tracking mechanism for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=crazy+rich+asians+torrent+magnet PDF link annotation
    • http://winfielddeli.com/ckfinder/userfiles/files/20225968704.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/guwusujakoj.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/durub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1a8637d48---gapaliruvajoxobat.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/bafidasolejoditej.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210918021539.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/tolom.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/roxekokapikuwotegawewomed.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/debalorikawolizelinigex.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/57566146630.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614db9fabc2e1---pevibopovidazizizad.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/vodozoferuzubaloxuk.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/fagazi.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/tolunogamatisivono.pdfIn PDF document text
    • http://bulmarconsult.com/files/11376492606.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/48333249918.pdfIn PDF document text
    • https://km2804.com/ckupload/files/sidima.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/20732520443.pdfIn PDF document text
    • http://dae-young.kr/upload/fckeditor/file/putenowewigasadib.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614c444155200---86665158909.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/12812592700.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/3025975580.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/91720227056.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_off0000adee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC600 14740 bytes
SHA-256: 3584fdf49ce97627ca335825010b2155a3078f3c901aec101defab44094293a7
font_02_sfnt_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 10836 bytes
SHA-256: 3bebd5725d1fd33a7577a657e405b7d0a39bdf6ef45958cd03b147f29a84b3c3

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