Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12fc6f337daac09…

MALICIOUS

PDF

72.4 KB Created: 2021-09-25 13:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b624cf52c026ca5bf2335ca04fc5e9b3 SHA-1: 97d58fc72146aff04c302a30b897a7136e661798 SHA-256: b12fc6f337daac09c3faf2904118a0bcc8b30c70cfc6c18c7886fb4fc5d330f0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests it may be used to redirect the user or download further payloads, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://ankurgroups.com/userfiles/file/jisagu.pdf
    • https://autohausnschmidt.de/userfiles/file/rukubiniwesulewit.pdf
    • https://gabinetpro.pl/kosmetyczka/krakow/files/zalitedem.pdf
    • https://shidoremicrosys.com/media/23358463658.pdf
    • http://cross-winds.in/upload/contents/images/images/93308457259.pdf
    • http://patronusalapitvany.hu/public_html/upload/29598437214.pdf
    • https://g4m3s-4p1-12s1.com/contents/files/59852682728.pdf
    • https://sicurezzaips.it/uploads/file/28093169125.pdf
    • http://domplus.su/userfiles/files/delodikuved.pdf
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/8200934393.pdf
    • http://www.polni.si/Images/files/jerikopuku.pdf
    • https://karolinanowak.com/userfiles/file/44196662322.pdf
    • http://puebloexec.com/userfiles/file/99619704365.pdf
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/18303172612.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147c1ea1e131---71231412236.pdf
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/niriwezi.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/bd846f740e2913a65363383f75b786a5/xipunif.pdf
    • http://feg.vn/uploads/files/segedekukab.pdf
    • http://dcbestwings.com/uploads/files/poxulafogasajaze.pdf
    • https://moraure.net/js/ckfinder/userfiles/files/24177496907.pdf
    • http://skolky.info/foto/images/file/83436869589.pdf
    • http://sdds.be/userfiles/file/zovititunetalajesivezel.pdf
    • http://self119.net/upload/userfiles/2021/09/files/210915155902.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ps+cc+apk+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b51d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB51D 16792 bytes
font_01_sfnt_off0000cd34.bin
a5ff9f9bf1763e18b65918a24db18946452ab59c5df8f49340ff605e7a6c5832		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD34 10324 bytes
font_02_sfnt_off0000e491.bin
16478bfe5ae390f7d830ea6c8cb704d3f33a5137763013d0404dc9ab0d379343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE491 18488 bytes

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