Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbc0ae75d8105ab…

MALICIOUS

PDF

80.8 KB Created: 2021-08-14 14:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: cf3bc457c4c1af54f61e6f8146a8a553 SHA-1: 97c2af7a116ed05ee35ac193e69175971827a35e SHA-256: 6dbc0ae75d8105ab98ecbca2f586a89dfeaef683886a9ac088bc4b25eba17a8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous embedded URLs were found, with several pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crewmak.ru/uplcv?utm_term=descargar+one+punch+man+temporada+2+doblaje+latino PDF link annotation
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16089fe18e7c51---dowezimodinetopupol.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/rozaw.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/vusun.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/tagetedixufol.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f82232a6c2178c7b91d7cab447ed0d0d/bojabumeremabudemogef.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f28c760eea3---zuvoxopupupisugun.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb700f183f---jijidozodivukul.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/gatawevorotumosogew.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef471b266e---gupas.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3a90b680de87f7d623dd4635bbfc5022/66619798188.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e5215ca83---pexupizoj.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/015a044b09a6054199fa79ea4b1e87e0/woduwakopam.pdfIn PDF document text
    • https://cecprint.com/images/file/dobilabojeganowajaripafuv.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/vekodema.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fd2aa67e4---xakakuj.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/fabikamuvo.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/47b5d71752a9a6c4e7334c82ace26489/wiwajaten.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/gowota.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/46mv7u0enjeml1hjna521a8ad4/vaker.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/metuzutobujifusufaxoped.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609309f2cc365---xabotazuvadimefagoju.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/xenumimizekoxesuroxefa.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/momakaguz.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_off0000d4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 11452 bytes
SHA-256: d4c9688ecc23c05e53f84c198f89ef793c294ca68c7d71f65a0c277f0cc05410
font_02_sfnt_off0001076b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 17976 bytes
SHA-256: e864b5cd40d35e9fe37ffb8ceeb6f19cb35988212b4cd2a1537a133fff6c8bd0

Open this report in the interactive analyzer, or submit your own file for analysis.