Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e9893ceb755759…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 05:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b758df601ee9f60cb8cc26d315bf9be SHA-1: 2c45d7e908e9092c0339947af56c72f1ad7a5544 SHA-256: 14e9893ceb7557590bd70dfeab6f12dba2c7e387ad0f10d42188596a74fb7d2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the presence of multiple external URIs and compromised CMS uploads suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://huntic.ru/uplcv?utm_term=free+sports+streaming+sites
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/635822fa3171d99e99be06e3303b53ec/80983754376.pdf
    • http://creaorganization.com/depo/sayfaresim/file/23740385173.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/12ceb98cc43b1f17708cca12d0c605b0/87356046524.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/f2d1285551725ec51ee497427d77a045/77191148650.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd884c11f7---lamibadipo.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fcc2b8870---94552375758.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c78e705c9ad---mofipigizuge.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf27f279ca---vupajimuzokabin.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ln4q93j1gp1vlr4tr14vaj7l0b/ganobigegekipafamopo.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e271a5af---71129902142.pdf
    • http://hondaotohaiphong.vn/upload/files/15977635215.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/0205d49e0bdecaa17dba639504ef9ae2/miwabokukanunimonubuwekip.pdf
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/79817214437.pdf
    • http://adabaskimerkezi.com/upload/file/82388574106.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e3935a942---padonajelidareperi.pdf
    • http://beautifulmoda.com/userfiles/files/30538891300.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ccf8b124---62031482841.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4fc4fb7bcd4bffb4fa3cf14812f22cee/gujizedofobarava.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/c7f423d952bbd28011c79e9480b7cc69/17587392685.pdf
    • http://sam-global.info/files/file/59841238026.pdf
    • http://baigeleather.com/userfiles/file/faroduno.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a2aa1ccef6a24d41e0a16f7f894fb902/44815274456.pdf
    • http://www.hgbehringer.de/img/files/files/55617741035.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_off0000e8ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AE 16792 bytes
font_01_sfnt_off000100c0.bin
6d335b2500b7779fd334f9ef5a1513a07e947f11a79975af1d68e89f450bc20f
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C0 17176 bytes
font_02_sfnt_off00012d19.bin
585ab2a9ae02513cd6deddbb9b6428bb43564c415780550e5725d56704a66775
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D19 10528 bytes