Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f1c9c2c8eba528…

MALICIOUS

PDF

77.8 KB Created: 2021-09-11 00:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d0d0a26d9c4788cfa8808e8faa71918c SHA-1: 8a742dbbc5dd31e241912e08dc3fb2273e83c231 SHA-256: 07f1c9c2c8eba528c83047799d300d2810e8c2d0646f34b0bcd84eb4aed0208f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of a 'free robux generator' URL suggests a scam or lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://sahamit.net/userfiles/file/10301105573.pdf In PDF document text
    • http://littlepearlbooks.in/data/eimages/file/13984530411.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/67046825146.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/nezamategukopoxoveliduv.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/38522950160.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f3b81fa15---mivatojotagejavigib.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/13822255061.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/niburirawalebixe.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/xofomujepabek.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/kubosajalasufotofud.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/mesusufelogix.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/wamifivexodesudujitokadel.pdfIn PDF document text
    • http://perksys.com/userfiles/file/robonozobelemabevegafop.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/81099001801.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/gewuwuviwigofodapuna.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/71006640307.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/65886791713.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vejevelumudodepigeferadi.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/kofodexizugadunofomexove.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/buwomexulelixi.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/dimoxejera.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcead0ef01---sosupejat.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f87590f115---pesiruma.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/kijefi.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/wisawidanutax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+robux+generator+get+free+robuxPDF 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_off0000cd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 10404 bytes
SHA-256: a600f5fc907136ffafb9c404530f82f75a639d9e1016718827156fc49ec9ab00
font_01_sfnt_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 17300 bytes
SHA-256: 156823f7a327c8ba439c796b33218bffcc57958fee056f63491e845c1f7e262b

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