Malicious PDF — malware analysis report

Static analysis result for SHA-256 d449e85b963cf22f…

MALICIOUS

PDF

78.1 KB Created: 2021-09-03 06:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fb684008cf3d8560715753a80f729b2a SHA-1: 8a3d6ebbe153480bed2f7872214dd0e655403233 SHA-256: d449e85b963cf22f4104310fb93eb4d96320780bffe353d36c716ce6ff1f0bde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and a high ML score indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/9dfb1e0c1480d603bfc4fa66f5a64e6e/xixirepukamifaj.pdf In PDF document text
    • https://jxloanchien.com/style/postimage/file/pakekomazotow.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/33e90412113ec008cf422a1828579fc0/93417588528.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/60025542877.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202108300147365764.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/nozubi.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/42253501457.pdfIn PDF document text
    • http://hainfelderteich.at/begazakotenozekun.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/gd5m35si37f5gf0891nps81duk/josopapakawese.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/dudivekejixuremikivez.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/ladukix.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/43549557697.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160818e8eb2828---vafepo.pdfIn PDF document text
    • http://fgosvo.ru/files/files/61055008560.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/8220813590.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3de863d67---balajadebixufefoliwapu.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/vovibitamu.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/52411509497.pdfIn PDF document text
    • https://keongracun.org/contents//files/7138103066.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/zevenus.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/wasixafekuxozegalo.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guwegidapoxazasalo.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/pubirur.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608216c8452eb---zuzowu.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/xodogibetejiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=new+york+times+newspaper+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 17500 bytes
SHA-256: aec16b75082aa12498278182b92bed7aeb56943f7fe6ad4e97ecdab799f889a9
font_02_sfnt_off00011141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11141 10884 bytes
SHA-256: 4d7b079f470cc910f535a66a28205561eb6e914c7c4b2774de747230ea1b5b9d