Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ad68ee30fd2444…

MALICIOUS

PDF

77.6 KB Created: 2021-09-18 07:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 552030b713e4fec93cfa874771842ba9 SHA-1: da59d2c002890fab13b676e66b2b2df03cbd9a09 SHA-256: 34ad68ee30fd2444ccea9c83a79f66c33da3c6e2efeb765d0ba8c5b110ebc6bd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The primary purpose appears to be redirecting users to malicious content through a chain of compromised links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/14211152888.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/88fb5941143d2d24ba79200fda135c59/82411597258.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/83d9aeb14e6ced3e398864f3aa074801/zafulowemadu.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/refapetatoze.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/26082299991.pdfIn PDF document text
    • http://brenderup.ro/mm/file/77814954040.pdfIn PDF document text
    • http://bankerz.in/qpic/files/86001987956.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/65078521787.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/vanedivaxofiji.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/57354171766.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/fad4457b30351dbc4ed3f71759f1d653/fipiwumofiritinoxajasur.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/dofoniropopexefogiruseta.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/mazalitaxisofalil.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/zakijirajovu.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/guvumufukigudase.pdfIn PDF document text
    • http://kesifveotesi.com/files/50000607659.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/33421281096.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/nelugujebopopagerawuwo.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/zokug.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duzovebodazuloditiwab.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/nisatumi.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/19424234269.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/8d98e6e4ce7f682c3cc35652f0eb8ac0/guparog.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144722a69953---62121555456.pdfIn PDF document text
    • http://webbuilders.com/files/file/12812158671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sat+guide+2020+pdfPDF 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_off0000cbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 17416 bytes
SHA-256: b68c9a660789f46f0b009fa060053c590bf63194aa9dabf07b9706db9dae6328
font_02_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 10552 bytes
SHA-256: 2f48dc41042e3c9d70ab9a16a0b564cd74fd013d472964dd694df3d0021e81f7