Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d02286b70c693b…

MALICIOUS

PDF

75.7 KB Created: 2021-09-18 00:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bfce31fb24cb74c6145e162487d2004 SHA-1: 657744bcb227fad08e9cc4060dc3e2c4822622ad SHA-256: 84d02286b70c693bbb059482c95e80abbd67c7bf9925626efaea1539c9b751b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external URIs and links to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards it being used as a lure to redirect users to malicious sites.

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://laborke.ru/uplcv?utm_term=hot+gf+bf+shayari
    • http://systemsbiology.at/uploads/assets/file/80744566854.pdf
    • http://change4best.ru/upload/file/dexipol.pdf
    • http://arsvet.ru/img/upload/pezibeletu.pdf
    • http://potya.com/66523871693.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/161438895984d6---30469649992.pdf
    • https://karapinler.com/calisma2/files/uploads/51814223949.pdf
    • http://hfengly.dk/skoleportalen/userfiles/file/komixepap.pdf
    • http://maristaslardero.es/userfiles/file/18361264856.pdf
    • https://ntiverification.com/userfiles/file/55021800445.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/gajuxofureradi.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed449617cf---35265614866.pdf
    • http://forepic.com/_UploadFile/Images/file/tesikurudazime.pdf
    • http://slovoveri.org/userfiles/zezodadotijeniwuputiwufe.pdf
    • http://vanprodukt.cz/UserFiles/File/rajedisunowogi.pdf
    • http://lollanaclinic.com/image/upload/File/mekesaleloze.pdf
    • https://chung-pei.com/userfiles/file/zemazekamit.pdf
    • http://pitchdecor-construction.com/user_img/files/74185002738.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337a2123b4d---fanipawelevowogazufaj.pdf
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/doxefefoburuzitaga.pdf
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/korunudesalosimegakebej.pdf
    • http://studiotecnicopetrillo.eu/userfiles/files/walikifosadazuvilinezipu.pdf
    • http://chelseafoodmart.com/uploads/files/lebunapaxirilogamof.pdf
    • https://sarvodayasamaj.uk/upload/files/nowidemupukizutokakosusur.pdf
    • http://snieznik.pl/userfiles/file/48400833557.pdf
    • 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_off0000bcf8.bin
8034f878e0b1b8bace9f500e5d0d00531bf51889edf0bd654372342985802bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF8 10456 bytes
font_01_sfnt_off0000d4d5.bin
310079a2547b1e6151214b4efb6e11ba9437b6d29747a3d5735404f28f80fc5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D5 20140 bytes
font_02_sfnt_off00010936.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10936 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.