Malicious PDF — malware analysis report

Static analysis result for SHA-256 012f0f51740056ff…

MALICIOUS

PDF

97.1 KB Created: 2021-06-29 18:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e2cf58be7a027a7404df00d878ff44e SHA-1: 54bc0e97eb88c496694dd00a3fdde4cb24f3b873 SHA-256: 012f0f51740056ff54e98f875feb5eca3d613b0d27ee4dca72d556f3c3bac43f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised WordPress sites, directing users to other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external links and the 'link farm' heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607badb21ed7d---52584346241.pdf
    • https://ahreco.com/uploads/news_file/59289162773.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/332248a9d54f2c96d927b056f76f2724/juwajed.pdf
    • http://abwalabamaave.com/uploads/files/nuxumemovirogatenivofo.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/23a2df9aa2bf0aa1abfaaa154806ef0c/16429621369.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/32549a0a47e97ee8e4ddc68fd78cf25a/46504214713.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae38f52f3d7---64632908607.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160967d4050391---falotawozuwibiwap.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/cfcd7e274d030571768b31187788f34e/dulefakujisaxugesizifop.pdf
    • http://barksdalereunions.com/clients/869108/File/xefedulofiwekosaves.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5dcd76daa5f9f9df56a4c86e928cb0f4/62025550449.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bf0439ff6---31509914912.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/533kdfte512o1eds6ic0om7f7o/vawodazelesexokopela.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e104e44701---pizunolaxumareboxadegidug.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070828fc4448---kizapisufotome.pdf
    • https://supermagnum-bg.com/userfiles/file/fatubibutagarup.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/r66odi1qnak7o3ch7r500joe9m/serixalobi.pdf
    • http://premium-h.info/files/files/87895109078.pdf
    • http://tischlerei-schlusche.de/sites/default/files/file/64961246190.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2a8ea5a040323097803a792534437ea/lemapujiborujuzemumone.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c49d67c3---7024275056.pdf
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/bitukulirasaki.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8b87aa230---lufovul.pdf
    • http://ahsaipu.com/v15/Upload/file/2021521013237682.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/64659438248.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=fifa+2016+download+for+android
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 16792 bytes
font_01_sfnt_off00010b14.bin
83c5f538f5a761442d15cc4a32a4f8a0ea49ceccd151836cefefed52c71338f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 10476 bytes
font_02_sfnt_off0001230d.bin
86762337b3753dee9dcb76eeae29f6e79eeb1911e47ae93b6d30556dc68a5430
pdf-font-stream PDF embedded font (sfnt) at offset 0x1230D 16696 bytes
font_03_sfnt_off000139c6.bin
9d56898e1897ce4490438d7a2e28f21d3eebae15a92b6fef11e5fc692a79a1db
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C6 30196 bytes