Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac3531982eac1e8…

MALICIOUS

PDF

75.3 KB Created: 2021-09-26 21:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 846233533c2a3169bbe9b6248cf5368d SHA-1: 5d8021a97aa9044e292a65e129f00ef7869cecdf SHA-256: 3ac3531982eac1e8183ab09fd4333b5cfd7814367b34b3916195c1659b77550e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing pages. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may also instruct users to open a password-protected archive, a common tactic to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://allytemp.ru/uplcv?utm_term=docile+bodies+foucault+pdf PDF link annotation
    • https://perfecthospitals.com/ckfinder/userfiles/files/zudasalaxibumero.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210914192428.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/38141820518.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1ffe32f0bf85094d661c6e5f07b58c08/42268870094.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/fabefinode.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/masefixilu.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7702d62e---debaxuwilagixofedelib.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/lulipufumuzafefuseba.pdfIn PDF document text
    • http://ijfbn.com/editor_up/nopepoxude.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/dclnagl08ls27nsja481rubsos/xazotojidilizuga.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/91664712751.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/53c6f8869af4fd2cd01415e4f1a0ef19/gikavujorurufanobakow.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/jezalovunil.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/50204298992.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/nibeja.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/vokozisurodowedafaxew.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/3024342850.pdfIn PDF document text
    • http://northamericaminingexpo.mininglifeonline.net/file/19Y7zPqP1V9QGhTj.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/mifevezovetevape.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f50ef98b34---74732758435.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/rorurunebaxiwetobab.pdfIn PDF document text
    • http://montesantangelo.it/files/files/bizekifimaraloludibidubok.pdfIn PDF document text
    • https://fishuntpesca.it/file/bizasafefenenudago.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/petosetinolo.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_off0000baf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 10652 bytes
SHA-256: 67d1df039e53fa620a6ebb3f162702ca6e44accd71bf0b3584dc2b33daafbc48
font_01_sfnt_off0000d336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 20064 bytes
SHA-256: 97cd106cfca21a24f1b37d60e184658ea548d9aecd0f22381bfdfa347d022577
font_02_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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