Malicious PDF — malware analysis report

Static analysis result for SHA-256 4608005e2a2744df…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 03:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03a7f39e2a44f7362c7ff9473d949e56 SHA-1: 0961a0a13f8ede2a14ce88df1c31411e6897f55c SHA-256: 4608005e2a2744df6c79f400ce7e288e1ed7e584572316dc7105bba438849f34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dokuxape.pdf
    • http://shinex-auto.com/userfiles/file/dixumunijolinejavi.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//13377210803.pdf
    • http://ahkjt.com/upfile/file/veniforifisizexofisago.pdf
    • http://chaitraglaze.com/uploads/rolebipawukepo.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/a2c757e086b5e65a91a0d86c091fae06/gataw.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dea18dad0d---duwimepowufap.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bef66344ca1---rejoted.pdf
    • http://barcelonasixtytwo.com/userfiles/file/54544675802.pdf
    • https://wita.lt/images/files/miwisokanumijelojuwixo.pdf
    • https://telewebmarketing.com/FCKeditor/file/kubakejuzizogataxoj.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/6b7ma2b81gm0fv3comvlhaeoa3/jazefawezofuserajofir.pdf
    • http://elisa5888.com/shopadmin/upload/files/58742015453.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfd4ae797c---zudokawazowezupiz.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/6836ebb905aa9dbc2b0774dc57cf393a/97270263857.pdf
    • http://adbuffalony.com/uploads/files/gitibujejogiwonila.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/91c0654d2f673c3bc10291c52396f8dd/32397639717.pdf
    • http://nitexprofi.cz/userfiles/file/80034480512.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/vpmr0bo5klf7lihu31bi8105h4/megerogikatenukuk.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/2d202db9c190aa47fda07a6188716461/83798052026.pdf
    • http://adamslakeband.org/userfiles/file/82708635740.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/93255037058.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae052d3748c---93037544066.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/4su6n6obue4u3rv04ht7a3tgr0/xogakezofo.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/8c5e289553d94b5b04b375907ac68b08/75009779870.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=google+play+store+app+update+problem
    • 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_off0000eb47.bin
474cb58ede923c703437bd6383e8e8ad755fb34ffd74364b0d1502c4ed5af715
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 17300 bytes
font_01_sfnt_off0001181e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 16792 bytes
font_02_sfnt_off00013035.bin
086294f08cb11fa0d5dfaaa00e08131e2ece9ba32d86b6b50dab716370391572
pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 10932 bytes