Malicious PDF — malware analysis report

Static analysis result for SHA-256 b219986073d32378…

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 06:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 38e6d3e327885c7fdc3c5dcb5f1e65fd SHA-1: e9184e7177a5ca0fe198610fb0a0b4df8575717b SHA-256: b219986073d32378cdd04b32e1351cb8f558af2ebb43eb5a08a79da5c724c5cc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to a phishing site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://uhorder.com/upload/files/bemoda.pdf In PDF document text
    • http://builderall.info/userfiles/file/1870537194.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/naxebakike.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/xopizogomimugezoxonewo.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/051859346d357a380f76a146b3552668/luwavi.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/13858382385.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/95018402735.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/32192346700.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/27619524042.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/12173838122.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/bixojin.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/31750831253.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/98d981e4e87b2ae7270e0bf2d61b6ba5/gagivetakifi.pdfIn PDF document text
    • http://vipdiler.ru/files/file/maniwumas.pdfIn PDF document text
    • http://ergakiland.ru/files/files/68831025081.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/xitujarevox.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/68091455502.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/88928820173.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/43582404491.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/59509964495.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091205542268.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/zirugurepuzijaribuza.pdfIn PDF document text
    • https://tdfstore.it/file/tuvugibewul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ace+vpn+apk+downloadPDF 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_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10276 bytes
SHA-256: 1e833403c08d921a1989f31201d35257c5cd35beaccd1aff1a1efb8f19275b21
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 18112 bytes
SHA-256: 63903519ce13df1745a9b4544de84f06004c12bfa84427ced3a47ae0c3d960a4
font_02_sfnt_off00013356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13356 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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