Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf4619759173743…

MALICIOUS

PDF

93.7 KB Created: 2021-07-16 09:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0a460a33a1d2dc794ff57c443ceba314 SHA-1: 0f2a3f4e0b493f744e14d2c698882ce9a8cd1162 SHA-256: 9bf461975917374337489cbca0e904d9bac30be59b3120d6d3db16b1e7e03156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://synerhu.ru/uplcv?utm_term=what+does+rawr+mean+in+dinosaur PDF link annotation
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a30aa0e1cd2---71414734405.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/balurikumikegij.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/61174609324.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/bi1ssomntd67ost83u05jl91pk/93816601968.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/31784384961.pdfIn PDF document text
    • https://luminex.pl/upload/file/52706687186.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7081e0f060---48203768034.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/60321979971.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/22906909572.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e64f235e98a4b228c2aae9fc4f6516ba/62664702551.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/2819395413.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/5db6faf63d6df2d695fcbaa63a8e7933/3833673191.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744fdaf1b03---26545307815.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/bb70c0f23dff662f623736b330753946/17502785745.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/87325785189.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/49251080906.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/papobulowafitetibukidax.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/627cd68b0c6003f8ba3f9b17595b0dc8/91902123648.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/530ffe886d13e12f9aa35b7a427a43b0/jutogowezigopo.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/opr9lp5trsce5qlgujpqc9gcr1/tigujalawozepove.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaa4ec85b4---72763416607.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/paxam.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/xafakorerila.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/3311b7c87ea2810198b8b4b031eb47a9/lodesejewidukukewal.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c239c4d8d7c---21388552458.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00014ade.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14ADE 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 10648 bytes
SHA-256: d734c3f1fdffb377f2ed8e4b69f766078ecee0634ef667dd320e44fc41dd00f2
font_01_sfnt_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 22472 bytes
SHA-256: af8fc76c8eaa0542929cc8103901ab78f5f105b91443d0b8d7cbfe7816f422ea
font_02_sfnt_off0001254e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254E 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off000132cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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