Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f64d143aae1ee21…

MALICIOUS

PDF

80.9 KB Created: 2021-09-15 11:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2beb6cfe9d981ee6134eb5e7589e62db SHA-1: 3bb4f74a25355ec3ae4a6f396c9eaa9e640cd3ef SHA-256: 0f64d143aae1ee212045925e1938df4779792b437b67b4da0f663b7475315dec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=naruto+heroes+3 PDF link annotation
    • http://iraneto.com/basefile/iranetocom/files/28977763388.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/depabeko.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/95571269688.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/39480118659.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/31329131316.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/bewagezotinoxutebojirijup.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/57646941559.pdfIn PDF document text
    • https://digireg.pl/upload/31488779836.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/59768138808.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/64140368919.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/76530050348.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/dejepibifikil.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/memenevikukixivevisupin.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/76488353781.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/816832508.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/87381927117.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/foketemev.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/98342222823.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613536fbf3de9---36586435495.pdfIn PDF document text
    • https://rubfila.in/files/file/tijexufogesotida.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/u3vm9109ff3fq0tehpfvoclo46/zupututexeb.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/79445329096.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/momamotevulegosezi.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/kedasipigeni.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_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 17460 bytes
SHA-256: 83aedc1b3df1893b66e5d446d31a3dbf6f3607a18c48da649e1c7c17de920c48
font_02_sfnt_off00011f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1A 10212 bytes
SHA-256: a69e95fad3baa17542df2248f20be3b3be5d61f13ae30c20bb914f9a70991fc8