Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0091a1578b2b14…

MALICIOUS

PDF

84.6 KB Created: 2021-06-28 23:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53c6edeca13e6f00e2e1d86faab38cf2 SHA-1: d0d4ff0ac32cb757437fd714e69b0a3558f034ec SHA-256: be0091a1578b2b1463366722ecc38bf01142564dd467bde9276af707160fc435
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to compromised websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807255b642a---86032433873.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/vosevoxatamenukarat.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e059b2425a---wadesexitaposoz.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe47a6s9aknh38p3srltpk1tdm/dugiwilej.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/i43acodn1cg4lc78878kivrhm1/mutixanotimoti.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/bc4d1108dbbd7b43c36c78f24d368b0e/suxusiburumilifunebodesak.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a851e95fb3c---fojojebejuxen.pdf
    • http://lasfyy.com/uploadfile/file/20210604153223384.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afe681e407f---vabawotemukobob.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/6e6436f4f931725720590f39507f30a8/73236091615.pdf
    • http://ferrogep99.hu/static/media/file/faxebil.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/vowutoxorulojabul.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607892d01e40c---losefal.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/4qtu7d0fn8489027qfg38vlkg4/69285283512.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e6b33e3c7---saziletepififejulugoviv.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/820dd4fb45050ccb5456a984a8bf010f/52066715849.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c116996cd86---65195124940.pdf
    • http://envisystem.com/upload/userfile/files/zedenemitunesapaxalirumu.pdf
    • https://mvpartners.be/images/uploadedimages/file/veriregorujud.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d179d6bb4---14708026124.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/87ahd6dvlv73e9th5m4l5dv0f4/gefavilifo.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b63f15ac0d7---47106169297.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b7b8f1508750f40c08adb3ad296b155a/weninot.pdf
    • http://mstreatmentadvances.com/userfiles/files/rapofenolinujugijoza.pdf
    • http://patanamachine.com/imgUpload/files/50231485425.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=median+income+of+los+angeles
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e934.bin
111411c6dbe6bb6bfb892e09d73958a9458a2212a7b2f63b88a23a3dd0f2b65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 16936 bytes
font_01_sfnt_off0001154c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154C 16792 bytes
font_02_sfnt_off00012d63.bin
4360dc9407969b1926823e068934394a9bd4fb8d0e7a887c13a7c22ffb71b438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D63 10612 bytes

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