Malicious PDF — malware analysis report

Static analysis result for SHA-256 a772c2fdf59620ae…

MALICIOUS

PDF

81.2 KB Created: 2021-09-18 22:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1885555afc726bd2097acf3206fc1e47 SHA-1: 25b8b9a54c682ccb86b9d95ab1bdfc5278b6487a SHA-256: a772c2fdf59620ae6f33b792d5a6825e64fc707f20016fe9ea39f7a5a9407da6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=sims+freeplay+ios+unlimited+money PDF link annotation
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/54854207266.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/31249754705.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/zuzazirekejebiges.pdfIn PDF document text
    • http://futboltotal.net/images/files/ladoxavupedamavobupopu.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/sazixofubiwak.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/74809324349.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/piwebi.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/73336941534.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/15888754548.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/81825091848.pdfIn PDF document text
    • https://brianspradlin.com/userfiles/file/50351735788.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/geriwuti.pdfIn PDF document text
    • http://leruichem.com/upload/files/91254939495.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/60345914437.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/26244523519.pdfIn PDF document text
    • http://robbes.nl/media/files/84648893516.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/47817740068.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/63679097672.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropalaboralbarata.com/userfiles/file/30958787118.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/53990155681.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/2877708133.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/66796610018.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_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA4 10948 bytes
SHA-256: 109689ac3fe9d30c60a447c4c1b2f836cf3e1ba6aecd5c74a44738af7e4879a9
font_02_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 18512 bytes
SHA-256: 72e07b3d2d75c00c225636d086e146a10474cd79300343882c74a026e1d459e2

Open this report in the interactive analyzer, or submit your own file for analysis.