Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45d264576b16978…

MALICIOUS

PDF

72.7 KB Created: 2021-09-26 18:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a30c240a4238d8f0c3dba89b2efd0f2d SHA-1: b29697a270a370e96c0387d148de87497516c442 SHA-256: e45d264576b169780d154f8e2a6b092642e1ee1e9d93bf62ee65aaf93ebd7eb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting, a common tactic for phishing or malware distribution. The presence of external URIs and link farm heuristics strongly suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://alemotta.com/resources/original/file/85576499753.pdf In PDF document text
    • https://baatco.com/ckfinder/userfiles/files/ropogotegopivelunobo.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/lebuvusanomib.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/dibikeburufo.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f521cc43d---nemogubobulawavugimasubof.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/satewi.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/tulilorusixixig.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/tuvuwesuxizevovoxewure.pdfIn PDF document text
    • http://juncheng.tw/upload/files/89397611048.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/49868929317.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/7489576870.pdfIn PDF document text
    • http://boldogelet.hu/media/volaxufejowila.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/vewanabobumobezufig.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/zuxuxopub.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92367368843.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/xesadujimogiwaxufemu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137dd2f544c5---49916917528.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e39d991407---7840886083.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613662dd9628d---72790557151.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/zapatizidamisizovipije.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/molisutib.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/1779640039.pdfIn PDF document text
    • http://technoprofile.ru/userfiles/file/6798729087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cheats+for+gta+5+pc+carsPDF 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_off0000b5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C3 10680 bytes
SHA-256: ceb04329a0f616c1d96cdb0746fce88d3b26462639ee9a9b0da824994212aa65
font_01_sfnt_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 18032 bytes
SHA-256: 842555ebe3ca9ab1ad3f01d2be29ae7b0ee108f0cde634cbc57f0f5c40b18ff7
font_02_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1