Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cded425b7ccb1f8…

MALICIOUS

PDF

87.7 KB Created: 2021-06-29 09:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d425aad18a00fc2c3a2ebe3998c03868 SHA-1: 4fe880dd4a07ba863f674799896201086ff516a7 SHA-256: 9cded425b7ccb1f8deb8dcb89b3fb07f2ed433f6575483f1cd94a64ee044803b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, including WordPress installations, suggesting a phishing or malware distribution campaign. The presence of external URI heuristics and link farm indicators further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wastran.ru/uplcv?utm_term=yellow+paper+wasp+sting PDF link annotation
    • https://mobilieroccasion.fr/uploads/file/bedelinizudigomo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5e84a103e500f2f18a7e933b1db687ae/rigidijeno.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/kabuwolodureja.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc98dac2baf---degesaruga.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607290f85f0d1---muwukeguxuraj.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0ce1becc4805c580334c4bb8fd2c72ce/76924758645.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/508f7b5caf6a0b2390546ad54162082d/sivemanixadunowasiw.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607614c066e69---40189558103.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/wifuxawuditefu.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070885e28b71---98927769660.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4dd1b79a---tuguxoxame.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/7496314932.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16073392573451---64260587915.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/vkkt1tbi80d5t60v61ht8vmi1g/luvadojofol.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/22576586514.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160755e20a68d0---dubugekopetariwukirem.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/96607258662.pdfIn PDF document text
    • http://hodori247.com/uploads/files/tekuwopozuwewajidi.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/4975957255.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o2e51avd8miv42dt22cmj822cj/39993754381.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a040aaf2aa2---rirosagaxabiwaxawiri.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/vromf21040eq5rfvk79maf72ti/5764099930.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/h591bo3kt0a6d0tdcfihm59v5g/zifosadunulub.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_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B28 17872 bytes
SHA-256: 27e5270c391cf5d6027603f40b4f7b4cd14556d42af462a971480d189bdece17
font_02_sfnt_off000139a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A2 10496 bytes
SHA-256: ec1cadbf16f1a5125691528a259916cdbfd4caa2dcaf2df2b727acff0e8d007f

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