Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d14f97fd088991…

MALICIOUS

PDF

68.7 KB Created: 2021-09-28 07:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e42b0b5937c7cabe807abc9bd3d3893 SHA-1: edc390d18f84e4e3b8fd1ed20f84d43ae5047050 SHA-256: 08d14f97fd088991eda3b4a34eb4baa68c89223ee62dae1f0ce82dda481bc814
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a strong likelihood of malicious redirection, possibly via embedded JavaScript or other PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=gta+5+mobile+hack+apk PDF link annotation
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/20988575664.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/18046bb18883effe169324cf263fbfc8/58093593870.pdfIn PDF document text
    • http://healthywithhart.com/res/file/78931129057.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130ef52c491f---nadidusurawivokunik.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-10/20210910090715569342.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/17398266105.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/51504235215.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/68919734745.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/pakojurex.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/4903712098.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/pijisilobizafuzage.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210915191716.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/bikivalawakidulakatosal.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/notajivevaxeveluwaxew.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/66658678555.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/68576135699.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/piluzagurodadof.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/vipekebabomasaziwaf.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/fkgr1na2bn675e92q6p4lnl0lq/50614236900.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/togiponijiweruxunesenu.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/gefamo.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/tederezugagogotabunoja.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB022 14512 bytes
SHA-256: fc7a5e48102c745964c156d9b1f726889fe74531705ffeab6e42a89d13240067
font_01_sfnt_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 10672 bytes
SHA-256: fc13070db119cf3f9a579571b72900d81f2c7a5d76a2e0032f366f189de1ef3c
font_02_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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