Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6184c573a7bb5d8…

MALICIOUS

PDF

81.3 KB Created: 2021-06-28 16:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ed0c0ed4d0848cc1444e7a8ec5efe7f7 SHA-1: 745e6fbd67cb9e88915a642ff83a96042263b0e3 SHA-256: e6184c573a7bb5d8c7469f8e25b0f958957ffba71dd11b1eae67a02c49db8977
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The primary URL, 'https://inwebjor.ru/uplcv?utm_term=pokemon+final+red+download', suggests a lure to download potentially unwanted or malicious content. The presence of numerous links and the nature of the hosting indicate a phishing or malware distribution campaign.

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://inwebjor.ru/uplcv?utm_term=pokemon+final+red+download PDF link annotation
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095700189769---masepapirigujigaje.pdfIn PDF document text
    • http://guchenes.com/d/files/wopozaborigojiw.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/82508182528.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16097dc52e839c---zowevofenikovabenis.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ed9070067---fozazaborunagavekaxow.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/vatikelureja.pdfIn PDF document text
    • https://pindimana.in/uploads/file/90198415727.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/48529750838.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/80885830639.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc4210e17c---24918331366.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea61e54d0f---bivobufosazep.pdfIn PDF document text
    • http://ciskmv.com/css/file/puvapipetir.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/4ta1hhulk92u2bf4mk52drrhp1/11763337633.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/14804202268.pdfIn PDF document text
    • http://vejwun.cz/images/98167095627.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/600b81f852c95aa3ced6113929927ce1/689362449.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/powumix.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a525640671e---wibelurixafiwuferik.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/29339115765.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/gagapizuboxot.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160834f970d74c---sinesarakosewuvibibexag.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6slsojokf9jh37e0p241knnmp5/pamawomujone.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/fevabipivurivab.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8d78b6cf---73484365770.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/74586449283.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8e9b11035---69409797776.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_off0000d611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 10428 bytes
SHA-256: cbefc6e1cc19cadcc9b1c0f6bc74e2b049cd37d6cc99da7a0fd56cd2e4622501
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 19544 bytes
SHA-256: 355c6823203ec47307cb90229038ea6ad2a236f4dc0affd2cc31ed322e30b99a

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