Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff7ad696e11682d…

MALICIOUS

PDF

88.9 KB Created: 2021-07-23 01:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 025a574a7dad946fff4b5ff23323b7cc SHA-1: d75b9d1683714b2ec90a6d3e87de39083dcda500 SHA-256: 9ff7ad696e11682d1448188ca0ede84a6356259257a5ba5e7fbaa85bf711a245
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The embedded URLs and the nature of the link farm heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://eminencesolutions.in/resources/userfiles/file/59669820937.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fcfb716b3c97adc1947950626678ab20/robevirameluziwekimisefi.pdf
    • http://libertyquad72.fr/userfiles/file/zajulure.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52d04dacc1---59562625695.pdf
    • https://jpjplumbingandheating.com/FCKeditor/file/99697255617.pdf
    • http://julianowka.pl/ckfinder/userfiles/files/47912127233.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c70d25e5509b60a98f326a56d43fa251/kokumegineta.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1389127d53---60117040116.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c759231348---39320509251.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/f6599e3364cc6bdfc5ba3a3492eebbe9/59219729184.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/tp0od2d6ba9kh11i4u55jej3r1/94241318993.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e629b5752---38892610904.pdf
    • https://royal-art.pl/uploads/userfiles/files/fuwunuxe.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b2d65fa9c---97736997179.pdf
    • http://keramann.ru/uploads/files/wokadolinu.pdf
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/xiregiwuvob.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/a54b57d9eef95c368ea3bb97d595a96a/20003103825.pdf
    • http://bisenzia.it/userfiles/files/wuvobu.pdf
    • https://mamo-tato.ro/userfiles/file/77342646632.pdf
    • http://bearings-home.com/userfiles/file/danijevaja.pdf
    • http://dhleisure.com/ckupload/files/32684445781.pdf
    • https://4of100churchstreet.com/assets/media/files/98133342655.pdf
    • http://maychamsocda.vn/images/userfiles/file/fasel.pdf
    • https://vestol.bg/files/file/91735860820.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a0df53efd4c---67430370495.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=liturgy+of+hours+today
    • 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_off0000f6df.bin
12e63a706a45f43b6cf99fffc0baab99b540edb43288c0eb419ab9c2f69dd3e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 10520 bytes
font_01_sfnt_off00010ec3.bin
447854816be59e4a14a163d799ad350ef2ca5359cd8ff4091d3d6d0d56fc5013
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 17648 bytes
font_02_sfnt_off00013d3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3C 16792 bytes