Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bf15e2d030a281…

MALICIOUS

PDF

81.9 KB Created: 2021-09-14 14:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e828cb514e7d1cb815e720967b5b73d2 SHA-1: 2965214be366d610c6ca613548d96d9cfe3101c9 SHA-256: 44bf15e2d030a2818b8f49025da9dd104f6a165ee9228f3d5f5c9c66bdf85620
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. It contains a link farm with numerous URLs, many hosted on disposable or compromised domains, designed to lure users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/12172226023.pdf In PDF document text
    • https://dnmpaint.com/sdcc/images/file/debafuwatefuwoparinedo.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/gadoxiretivolakenolod.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/92134329706.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161372c68a17db---gopelefasu.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/fopepowemate.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318628eecdd---75757542224.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/dakuvatarasarimopo.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/sivotujisekeniwora.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/dalulezisawuloboxi.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/44361954112.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c21802cf9c---42157014361.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/netafamage.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/18989722672.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/29851678188.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/94814188744.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/47550524379.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161328ff34b7a4---96974820892.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/gujilixiputajesowuva.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/19712247411.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/e86fee8b13c6669e0361391b37bc5bac/97832117683.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/2979159066137d3ec2e0ed.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/53235892711.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7617121b1c2860ded5339318bee090b2/55912437293.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/wazagovejukolusipup.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/xapodapif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=escape+plan+age+ratingPDF 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_off0000dd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 10412 bytes
SHA-256: b04d8bc2fa95b58fc9ecd2a1683afe960c7d3b3ac66fd28e547e7493e49b9cd6
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 17276 bytes
SHA-256: dd38dac1cd0d045f9ba8e9ac84de04d24a0fc3730caa05c5b5a206a852c2ea8f
font_02_sfnt_off000121e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1