Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97ae43b3ad78938…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 10:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f8be47ad4d0c747c0c1049959ff19460 SHA-1: c67c8b589a410f91c4205f07e6c55932f11dc7ad SHA-256: f97ae43b3ad7893817dd29ee72fa561216ce51df525accbd865bd0b15f66f487
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. Heuristics reveal the document functions as a link farm, directing users to multiple compromised websites and potentially malicious URLs. These links are likely intended to facilitate phishing attacks or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://archism.ru/uplcv?utm_term=scolopendra+morsitans+pdf PDF link annotation
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f73be974e51---sisazomavininajagili.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/84215749090.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/94001946479.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/jimakedin.pdfIn PDF document text
    • http://elanaclub.ru/userfiles/file/74279799077.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/pibupofodawawu.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/17241829573.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/keteg.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e3ff3dc80bd---27320708200.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/dutewifixalaxig.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/popevu.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/rovaviramuzarevovu.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/sopejanosab.pdfIn PDF document text
    • http://mousike.it/img_ins/files/52491548644.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/14f992ccd41902e0e78d28f89507be3c/lokusawilare.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3abe6722a---zipos.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/80ae5573e3d8946d351c564095c2a1a2/jevitojol.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa6295de6---zomuxopototevorep.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160957cdd73b78---5294969129.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/vosugogasixa.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d5964d166d475da8d4dae83e7164fb0e/93027788445.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/15405511907.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/05588987bcdfd2005f9b78fcbe8593ff/kusanimozisepabudo.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9bd07646---jurujonobetepabatenugojiw.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/bojonefopuzoxupukidemura.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_off0000c4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D9 16708 bytes
SHA-256: e2c5079ef37e0c5f08279db6782f7b056940e9d93dd3d77441b28f052ee98e14
font_01_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 10856 bytes
SHA-256: 205742d776d5037de3aa83f32dd8d30ed4df74143cf3312ee4b33c6f88a55954
font_02_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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