Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0781be35e6df7ff…

MALICIOUS

PDF

84.1 KB Created: 2021-09-18 14:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd91dc417dcd4802d3faf1373d654cd6 SHA-1: 8887d4ce4e6fb875c967cc5a3087c8c314287b15 SHA-256: f0781be35e6df7ffa7780b0a19e48a3bbaee837b20868c90875b39fbd6b1f260
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links and a heuristic firing for a 'download button' lure, indicating an attempt to trick the user into downloading further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure and link farm behavior point towards a downloader or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=varma+movie+bala+watch+online PDF link annotation
    • https://ibexquimica.com.br/ckfinder/userfiles/files/19112792193.pdfIn PDF document text
    • https://agrando.cz/files/file/tujikidixumemebim.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/nudofadixitikegasitevutu.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/nokowakekafudo.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/83818337958.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/wopoxovoxetajokuwaxud.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/29796594780.pdfIn PDF document text
    • http://xsteelstock.com/d/files/38943333980.pdfIn PDF document text
    • https://izr.fr/files/bowekovemuginitofinabo.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/25445433656.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/32086652005.pdfIn PDF document text
    • http://waycreon.net/bhaskar/yii/upload/files/74149305543.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a401d4bb0a4f796e7dabe86e3b22ca4e/fojuritirujom.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/73193813866.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/kinejivo.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/19486027288.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/bupifesiwagufo.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/17106392259.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/50802990844.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210911_FCBEAA7DB4051F5F.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gifiwo.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/joderidurabaxonevuraj.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/xijedib.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/joramabigopikisiz.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/95521134340.pdfIn PDF document text
    • 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_off0000e38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10588 bytes
SHA-256: 1f8f7248eb3bd59f4856d5dbf13fc9ca765e4ec083c2bff4fe2801230a7c91f2
font_02_sfnt_off000113a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A0 18228 bytes
SHA-256: 589ff79d19d112f3643b08d25539e8cd118f71dc94b25fc76f2fd6dde751999c