Malicious PDF — malware analysis report

Static analysis result for SHA-256 083546518bfa6f48…

MALICIOUS

PDF

73.0 KB Created: 2021-09-15 19:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df266729737d03781439d3a674fe8f27 SHA-1: bd24e944b37f6d88826e4f4b89438bbcef871033 SHA-256: 083546518bfa6f48f1d1e9e7ce2f70e1677b59ca62230810a403b8560f6a4599
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on disposable or compromised CMS upload storage. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/4477269662.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16132f67b2f11b---kobasumetukag.pdf
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/lapal.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133974933551---sorabud.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/84973ba6fed68813885197d67c6c1672/4634810801.pdf
    • http://theprofitnesstrainers.com/userfiles/file/68231024960.pdf
    • http://samafb.org/uploadfilefiles/bavak.pdf
    • https://villamishkan.com/310renonew/front/images/files/4063275240.pdf
    • http://gilendor.cz/userfiles/file/tipili.pdf
    • https://fwstc.in/userfiles/file/80407721339.pdf
    • https://cqhuaan.myhost360.cn/upload/files/09-03-01-44-18-97.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/dbe39dae16df3835a42e10074e70f397/11265331585.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d13e4ba0fa6fd848349628efabfa3303/fisiwitugizuwaxodor.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/15827214637.pdf
    • http://www.euro-fly.eu/userfiles/files/26202956934.pdf
    • https://vietrocknet.org/app/webroot/img/files/nemiva.pdf
    • https://corpusbg.com/files/fck/file/41745687656.pdf
    • http://topup-fight.com/ckfinder/userfiles/files/8516058279.pdf
    • http://suriyedostlukdernegi.org/image/files/kunerunakak.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/d5ncl2vo7ljt3ijhgeilf0ofj4/3574842165.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/94a2ca39f5ebd06c338fcbfa054166c6/xifojiw.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4061733d3bee46573cc81ff1dc23d751/zonasosupagamujudafipida.pdf
    • http://yanartextil.com/firma/files/91495023824.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/51bedc23b1d3e65d36c99e9c021bf997/ruxosapavug.pdf
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/19859717098.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=wattpad+apk+version
    • 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_off0000bde2.bin
4ff684cb990d0fdaff2aa861d6aaaf63fd6dd9ca0b3356200564bb0b6153282a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE2 15800 bytes
font_01_sfnt_off0000e626.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 16792 bytes
font_02_sfnt_off0000fe3d.bin
b7e16673e79064fd0e949316a003fb67c99cb742e0a555a9c8a242e5fc552a34
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 10488 bytes