Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93e6b66df8b518f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-22 11:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70c2d8b7c887fd80e9da9aa224db1c72 SHA-1: 3233462e16af49353389af666c0135849c27567d SHA-256: c93e6b66df8b518f82e9e992fcdae3ff36ff59a1304e69552ab3bc2468d053e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains or compromised sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=pixel+starships+apk+mod
    • https://labelmarket.pl/data/file/mepemi.pdf
    • http://legalinet.eu/userfiles/files/nebajifena.pdf
    • http://sro52.ru/uploads/files/relanosigoteregenuludaw.pdf
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/69970481918.pdf
    • http://ilksolar.com/Images/Media/files/51902875941.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f86d702ca3---40210207244.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bb8f2369b---rekizabaz.pdf
    • https://magnettoptan.com/upload/ckfinder/files/dazozekiw.pdf
    • http://naszymsladem.pl/upload/file/65687876388.pdf
    • http://studiocalcinoni.com/userfiles/files/69283145590.pdf
    • http://paulgraphics.paulsfashion.in/files/vibololug.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/65aba8fc4eec68c8fbc35138f0e23615/29602317963.pdf
    • http://molenat-energies.fr/molenat.com/images/editor/file/89104620494.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161394b34abd3d---wulomukomosasukorelogiso.pdf
    • https://davidfoleyinc.com/userfiles/file/16623777838.pdf
    • http://almawred-sy.com/files/adminfiles/files/zekex.pdf
    • http://hodori247.com/uploads/files/47374253963.pdf
    • http://effekt-film.de/files/file/33405742005.pdf
    • https://goooinggroup.com/userfiles/files/20210918_192039.pdf
    • http://comlark.ru/userfiles/files/zexefudomewufisubiwoko.pdf
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/befowiwudom.pdf
    • http://minhnguyenvn.com/uploads/userfiles/file/bifeg.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_off0000d0d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D1 16792 bytes
font_01_sfnt_off0000e8e3.bin
6f1731912f96f02f8a8ef4d852ff621b47bba9041970d3c8bccf512622340d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 19104 bytes
font_02_sfnt_off00011aa2.bin
0a3ea65f89b35f15908fd7cf3f66bb93ee3f3e76418abae05287aca1061671a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA2 10748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.