Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec036341ef3a6b29…

MALICIOUS

PDF

92.8 KB Created: 2021-07-03 02:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3eab3586a78462609b478ba379cccd76 SHA-1: 3341a971f187de80576c0148d5f6d4f1a274e672 SHA-256: ec036341ef3a6b29acaa73619c4a7df1ab787fb34ae0bc45cf615d9e3adb44ee
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URI heuristics point towards an attack pattern involving redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/wilibutep.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201543b351---31373944645.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607298999eb82---28957619678.pdf
    • http://solee.cn/ckfinder/userfiles/files/nutexoziwaxogajavor.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b0b99a6919ef1692adfe69be2bb3dd58/rugedufidarowoko.pdf
    • http://thuephotocopytaihanoi.com/upload/files/xinurabavafofilijeweragi.pdf
    • http://nextgt.eu/uploads/file/74749176825.pdf
    • https://chiuman-hk.com/images/file/xoxil.pdf
    • http://10glazsikeyrosa.ru/file/90132509603.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/12f64e57b88c672a2812dbceda11d76d/gijolone.pdf
    • http://veterani-pushkino.ru/userfiles/files/nodururuxigemurusukud.pdf
    • https://smartmedia.ro/app/webroot/files/userfiles/files/pomubakarepewolimexa.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/mj0f1nbcb9c7rfn0gilpmv0s45/5379946886.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/lludjhqk10e3p37uoo818hbv5u/35648508961.pdf
    • http://babyschultz.com/clients/72285/File/53904890568.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/8u73hp47nf4mt3rk004mdd7f7l/2616455552.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/672327f472713ff2a77075370ef476e8/28483970414.pdf
    • http://serramentisiciliano.it/userfiles/files/zutubuletanuj.pdf
    • http://buergerforum-tirol.at/file/fupabemega.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c813cbfbe---52197335845.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bfe932ba3---41060277832.pdf
    • https://maturana.cl/upload/file/dusewomunanamapazopaf.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ade61dedc44---65271531206.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3b5a77c64---kiwalus.pdf
    • https://mediaget.ru/userfiles/files/gakuzubobe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=where+can+you+learn+to+drive+manual+transmission
    • 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_off00010682.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 16792 bytes
font_01_sfnt_off00011e94.bin
773cce048bb23e42f78d71baa2d03150f37987092127d5670f74724af91121d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E94 17560 bytes
font_02_sfnt_off00014c59.bin
387b6b931afd6d67f23d5eee104c2e34fd14a7eeb12a5083e550463cf6ed08e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C59 10908 bytes