Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9126a9b7e891542…

MALICIOUS

PDF

209.9 KB Created: 2021-07-07 22:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 863902b2576e7d3a8232c27c51b1af36 SHA-1: 50599d456b123113f40fcdb2e1fb9875ff2b3ebd SHA-256: d9126a9b7e891542c92c4907a91c4fee8bfd985014fa6962b1edbbb0ac46978c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, with one pointing to a compromised WordPress upload directory, suggesting it's designed to host and distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9176

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608294cd68460---80556915503.pdf In PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/b42c8f10409dd656ac48ce226fad7702/jawagumed.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c596c0e0c2f---padusoriwitu.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/zusobubitamo.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/jedaxiralemiworine.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607db49fc7d9e---likatawiragok.pdfIn PDF document text
    • https://maclashoes.it/file/wufunemefavoget.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160837ed8763ae---tozukikisodufimofifoxow.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8f13f7b240db9209d4d7e7de2387f116/85981512323.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607370c7ac213---71436163137.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c14d17148---89009739012.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/laseb.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/62fah52nvee0nflu0a5o8gafp1/vatonipijivuxu.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/71bd5eb8825e7e46c4c793852777c87f/sulubogukatemeladexot.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/mazojuxofejewalopet.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/46627074306.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c364123b---wimadilegetugetezap.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/tugarukesanefujomokisesa.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/1653c68868e5f27aaf90010e56c26fa4/purotozezabusow.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/15792485787.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/vewomikuwulafuxixagonogo.pdfIn PDF document text
    • http://houselandia.ru/files/96563724134.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/9bdddee4a4412546e6aedaddc6ae22ff/5750380976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=taught+alexander+the+greatPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B32B 26288 bytes
SHA-256: 123c1b07a24b57e41ae6dadfa44c93dec1a91a45d2d446e601eac901ed72d783
font_01_sfnt_off0002f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F134 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003094b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3094B 10312 bytes
SHA-256: 8d8702e911f6b1ea936c03c97dd9bd54b24dd7039d0635f09a59e2b381dacfa4
font_03_sfnt_off00032047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32047 17140 bytes
SHA-256: 3c49822b526a5740d005b68267e3197bd3a7ea4577adfac9d1a22183acf7a25a

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