Malicious PDF — malware analysis report

Static analysis result for SHA-256 182ddbeaf7993412…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 15:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7f90f6c860206c3480124008105082e SHA-1: 045851bb65bfb38b11cb80a401720e48f518ed48 SHA-256: 182ddbeaf7993412a40e756f927a8fbf6d8758ac36bbc377ba13c1c4e7c35668
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The presence of these links indicates an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=cara+merubah+pdf+ke+jpg+di+android
    • http://magyaringatlanadatbazis.hu/dev/_user/file/gurasekonizamonuv.pdf
    • http://rileyillustration.com/images/agency/files/fojupimureliledosanagibiv.pdf
    • http://dotacjedlaoze.pl/userfiles/file/35834655456.pdf
    • http://allefrgycg.news-read.com/upload/files/44483249690.pdf
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/bonugaf.pdf
    • http://halaljones.com/uploads/files/74211806321.pdf
    • https://drrajanmahtani.com/userfiles/files/fibefogofusabuwugoluvote.pdf
    • http://rhondachem.com/d/files/25226175593.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f6f721847f5fb242d65ebc12c64dae2e/37443727211.pdf
    • http://laibros.com/ckeditor/userfiles/files/36689022686.pdf
    • https://abisspaandboutique.com/nbloom/fckuploads/file/belesinuxuboganilesoname.pdf
    • http://hotel-ambassador-nice.com/upload/files/lajex.pdf
    • http://dichvutot99.com/webroot/img/files/nonixozumibelumojazo.pdf
    • http://mkbeauty.vn/luutru/files/13159693785.pdf
    • https://mimpishio1bet.com/contents/files/51338318613.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/ralunogu.pdf
    • http://baaningdoi.com/file_media/file_image/file/vukojetugubenewijiranixip.pdf
    • http://robbes.nl/media/files/63877238540.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/12260126009.pdf
    • http://yummyschool.com/_UploadFile/Images/file/xepekoji.pdf
    • https://igk-lilienthal.de/downloads/larikajugenopexil.pdf
    • http://facilitymanagementassociates.com/survey/userfiles/files/musigikinumedinokisuzexe.pdf
    • http://kenhuffbuilders.com/userfiles/file/71495234840.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_off0000b1bf.bin
f21b7666d74b90b71a1b975ad648ef0e7a7ffa55ba9556fbdde11fcc5979fee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BF 11124 bytes
font_01_sfnt_off0000cb04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 16792 bytes
font_02_sfnt_off0000e316.bin
5b6e22ad2824ae0153a4ab7583a678edd60e5b3255b5392259bee787d877c15c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 14624 bytes

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