Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c6e5ed7cf2745f…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 03:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f535fa43f6704b290bef427834f923b5 SHA-1: ab7e944ee275ecf075f4e7c7f6142de26f74f546 SHA-256: 36c6e5ed7cf2745fbd1b1d586e505df93d3464c053d87562fcbc3fb7df488fb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to obscure the final destination. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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 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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b20c54791---danel.pdf In PDF document text
    • https://penal-garazh.ru/files/rugepinifemixoxi.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/akad.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a0aa6ae16---pixovaramugifakegubasik.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/bupavenageneminiwatif.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/201820196919.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/fumidetonejabanulij.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbef0cbfa2---wunadenizanowomekirupido.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/1ab5a7b4007cb3a16cd6df921e716ac9/lidebuxobin.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d691f57f51bbde8e9716759f5dc72d39/16753753091.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/fewugifururikadun.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5983800130248031c6accaad5aff1322/naseralasobaf.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82041995ef70ffaaa359c6fe2fd62c23/7582603274.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/203b274cec87c659cdd791571e613379/feselomefejiz.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210517180654210695660.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/lutelipuzuguwu.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/mowunaxumijudufofizeja.pdfIn PDF document text
    • http://land89.com/ckupload/files/fakututukomazopufisiger.pdfIn PDF document text
    • http://aroma--style.net/files/files/93189795865.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/474054218.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/vesilarilojotevobilaligom.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c61175692---rojomodoluxuna.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/71152444346.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/d0002m0fe6gj11i4mrq6dr5md3/goduxejipojuwe.pdfIn PDF document text
    • https://estoniapools.com/contents//files/vimemonuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cute+gacha+life+aesthetic+outfitsPDF 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_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 17648 bytes
SHA-256: 313804fd576472057d724cfdab4a5b4f7170d4a1e03f5136fe37cbc51c6e144f
font_01_sfnt_off000120fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 10540 bytes
SHA-256: 07e227e13170bf5882612562cba9f9f3575fa3bcc26b0ff63595f9fb3e0d26b6