Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d29ca9fba72b193…

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 07:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 50985bcaefa4ece665e9e55d8a859127 SHA-1: 6d6d9e603d1b7dd516dd1dd36bedb5fce313b463 SHA-256: 6d29ca9fba72b19379613812b3fb91fe58bd38f5b588db2a8a35f30e372307c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://coreaad.com/DreamDataUpload/file/25867860323.pdf In PDF document text
    • https://tomorrowhubs.com/upload/users/files/dijojumetajoforosisajela.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/disosezawotovigopovumurol.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a914da8d8---fulubixurusotowiwekema.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b29663da790---92456707373.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b421c8855507ba1952b689c1aba73651/rakak.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/repezowapan.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/soresirafodemizadus.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/49746706505.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/77608979938.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/jovoterem.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/zunugiboforobomepeg.pdfIn PDF document text
    • https://wecareprogram.org/images/file/xobexumunapizitisez.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/rizutixavin.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/3b3a67acca26eb068f9ed2bdbcf921d0/sokukup.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160952ad046d45---tikuf.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/kixufovizikuva.pdfIn PDF document text
    • http://darienhigh70.com/clients/878490/File/9029308385.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/0rgmhk1ledu9fkj8en7mf31s2b/61825453778.pdfIn PDF document text
    • https://polytex.de/sites/default/files/jalitavumame.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/29a2419a9dd26971f36b8feeddde9a01/wawimadabelujoroluvexiz.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/90584797534.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16126711f9554b---gebebebonarupo.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c96685da0cf---fefajavamuxujerepubov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=korg+monotron+manualPDF 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_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 18936 bytes
SHA-256: 283d5adc89b764f877b9f4991c0bbdc65863a91b2c7304977426aaac717c5fd1
font_01_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 10152 bytes
SHA-256: 37b094e20f0d57e353d52f90655f6ba3f56126e6312a71108ec175e3bdf4c926
font_02_sfnt_off00013b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1