Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69cf4f7d027ced0…

MALICIOUS

PDF

85.0 KB Created: 2021-09-04 16:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ff9e096cdca859132b929b2b0ad3c608 SHA-1: 086b19cec4d62eba9bd1e02d0646a873c5d35c8c SHA-256: f69cf4f7d027ced0766b5b202ccdcafc885028069c88d39b314da87c507d1e6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://datong-travel.tw/upload/ckeditor/files/20210722082240.pdf In PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/27895769218.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c288487e851---linili.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/78062074878.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/zobepukinefil.pdfIn PDF document text
    • http://canvangdientu.com/images/file/93696451320.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/zixupuwozego.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/3642147915.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eb5d42163---20214492027.pdfIn PDF document text
    • http://parentini.it/userfiles/files/41616308875.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/lomazezolotepinokafuro.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d0c6139ada0e7dd116474ee3079e1317/lanawaxajetufagu.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/fafujobapi.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/70321718599.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0cd510389---sitajamofutisob.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/mamuzugadapewixovid.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/zerixeralapifowavovuluvul.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/nfov6vk0g50r9tjpcgmdifdkl3/40091319800.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2012e3c861---ratazajubaruge.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/69245711990.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16108afcd87ad9---limovaxozozakubumewa.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/81464127489.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20c617706---vagogunisasemeponizomewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=bsnl+recharge+plans+up+east+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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 17648 bytes
SHA-256: 2bea3a500b9cbbb9e5221621eef2957bbe5d818a423f28ace166eb3e97e0a3f5
font_01_sfnt_off00011565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11565 10840 bytes
SHA-256: 37f1a01b9d45dcd678b7f245143ed62041534d3d02aebe59353c0279fc10f48c
font_02_sfnt_off00012e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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