Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa976e8a57353c97…

MALICIOUS

PDF

67.3 KB Created: 2021-09-29 11:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4dc19034ffadec80edc693a945d1ebe2 SHA-1: d5e963360f2d6a2d3d6f8746608ef105359f4629 SHA-256: fa976e8a57353c978852d420a76ef7ebd8ed7d9261082629558793b38e97823b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only interface with a hidden clickable action, typical for redirecting users to malicious sites. The document's structure and numerous external links suggest it functions as a link farm, likely to distribute further payloads or conduct phishing attacks.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://frigosztufi.ro/ckfinder/userfiles/files/lofuwenalatezin.pdf In PDF document text
    • https://thepainter.asia/upload/files/mivol.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/96415762918.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/romoruv.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/bokiralag.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/jigewabesawika.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/93826594651.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/35475937446.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/3080639989.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f88d00049d---79471658903.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/99362566953.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/25116194715.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/39918205854.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-26-00-21-18-39.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8e6da61c46088e438f9d1eb2a2177f0f/xusokurozojedogozelabogad.pdfIn PDF document text
    • https://pactforfamilies.org/ckfinder/userfiles/files/didikofatosa.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/46649351624.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/98136088614.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/talidezezojetiropinaxo.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/jukawazizufad.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/buvujakimetokenav.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/kowukilobekud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=vanessa+nude+picPDF 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_off0000ab80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB80 14368 bytes
SHA-256: 93f538d0644c1f17957e0bbce600b1d55d001530a13ee0993d70fb7410ee840f
font_01_sfnt_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 10212 bytes
SHA-256: 247f129ef21934e51defd1fa99377d680c2dbf83021b732de6436b2ec9899772

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