Malicious PDF — malware analysis report

Static analysis result for SHA-256 30995f99b6b1b158…

MALICIOUS

PDF

81.0 KB Created: 2021-09-10 00:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 74cceff7c4874f0e623ca9de5faf0cad SHA-1: 96e210fc3e991b97c7801f30e25397826ec46b37 SHA-256: 30995f99b6b1b158941b983cfc9ee0b3f096e198f8cc94fde1b742bb9cddffb1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or credential harvesting lure. The heuristic 'SE_MFA_LURE' indicates the document is designed to trick users into providing one-time codes or MFA confirmations. Numerous external URLs are embedded, suggesting a phishing campaign that directs users to malicious sites for credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://inwebjor.ru/uplcv?utm_term=imo+setup+download PDF link annotation
    • https://ppntassone.it/dati/upload/file/kujemubisukakivep.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/wimep.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/50027996115.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/feropereg.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/39cfc8438a12a2a5dbab346ac90525c7/modovatu.pdfIn PDF document text
    • https://gangnampools.com/contents/files/pasasupetogutuk.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/71440291860.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/laluga.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/51363773741.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613a78c33d44b---nedugumifisosi.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/29356619839.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/xolativ.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/kifupis.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/negeforurafupasiwomifoful.pdfIn PDF document text
    • https://atrax.hr/files/tativedopometubeginaka.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/78203814378.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/03/file/20210903_041740_100.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/fukatitikepivenizuwewa.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/44713208969.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/2473271107.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/66023536310.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/92579176036.pdfIn PDF document text
    • 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_off0000da20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 17368 bytes
SHA-256: 47b2fd512949beb6d56178fcdecb319c5c00a90be916b1184f58a0f103aff51b
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10496 bytes
SHA-256: 9cb06fb6794e439f670673badee5598067038e65e0f864e570d3bba10e638d76
font_02_sfnt_off00011ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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