Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d0b5703c413905…

MALICIOUS

PDF

100.2 KB Created: 2021-07-03 14:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 680167502f45cd2ec0e61b9220464758 SHA-1: 5111c854666affc16168234b87828b3d908a893f SHA-256: 27d0b5703c41390509ceb5f5d3c7a1cc0191af52e582e2fd1b286b34e1faac09
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous URLs pointing to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The presence of these links suggests the document's primary purpose is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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://entone.es/wp-content/plugins/super-forms/uploads/php/files/9639b6bc2bd31d8d6e6342956b724eb1/tuwupagupisaze.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db9f67a39c---luxetoret.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/v943rkd545mo1ai5meairlj5p3/29791533264.pdfIn PDF document text
    • https://cargobull.cz/res/file/gosujipujanon.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/05d4064490b082395161263e2bdd7f66/polemiga.pdfIn PDF document text
    • https://digireg.li/upload/rapisemeluvadaw.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/70561691360.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6713c81f---9819046892.pdfIn PDF document text
    • https://advik.net/userfiles/file/ribozalatevusij.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/68364894156.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/7585873746.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7h2o28dkd1mcnf8foeu7eu6hej/gibatesusumapagoxe.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/patirawozinoporazemil.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/12692218268.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/010317b1552494ce566eccbd611b47e2/xofexegoja.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/zemanewetenaxepewigoniges.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/81d8d017453b0fae89519f9911441dc0/45629924424.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210605095241.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/85880211088.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/kh12m47nreqgud6a7jgegtjeeb/43463108177.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a157875983b2bd628e9d2cc224399586/62966539323.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae06500196a---93395589270.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d204db1f530---24991544546.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095381e073d3---69822013055.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/426826500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=maplestory+the+afterlands+guidePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 19620 bytes
SHA-256: d7f0733460822e3c217b874a3ba1fee8f8866dadf5a405eeeed237cce1bae908
font_01_sfnt_off000124ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 5684 bytes
SHA-256: 909f73689caa228230d7122a0903e89bea381c6510d63cf8b044918c2718f2fc
font_03_sfnt_off000151ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151CA 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
font_04_sfnt_off00016757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16757 10984 bytes
SHA-256: 76396c601c067ceebf9e6dd3429fcfe816bdb12f33bc0e80c22fe71a2d83a82a

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