Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac02b95de1043139…

MALICIOUS

PDF

70.9 KB Created: 2021-09-13 21:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbd399725922ba158d9ae5120f69d93f SHA-1: 107cd02bda85b1acc893511bc275b1a022314af1 SHA-256: ac02b95de10431397389d8832828ea94baf8cbeb1df2bde2fe4d71f9d045e101
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The PDF structure and the presence of external URIs suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • 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.
  • 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://asesorgubernamental.com/images/file/54261413094.pdf In PDF document text
    • http://yaqeen-eg.com/userfiles/file/mufokoluzon.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612edeb58ad10---gikizajag.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/53219012450.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/48219229892.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/91191257301.pdfIn PDF document text
    • https://songiadahoaian.com/upload/ck/files/zibugazuxaditabezotutida.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/98699707784.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/masodofun.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/bodisabijanoretegavolaze.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/82382714722.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/88004398418.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/kivujotekakoropavojim.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/89a336fc0e51c8da21440e8368916cff/gelenigurefunevusipin.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/66455647584.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/batowiv.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/82136955998.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/98571787936.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/visibuzewu.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/15398877507.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/piferurapobu.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/92791712595.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/4800658944.pdfIn PDF document text
    • https://unaizahic.com/Files/files/47979400914.pdfIn PDF document text
    • http://amandamaitland.com/images/file/99929887393.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/40357351118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=lightroom+premium+cracked+versionPDF 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_off0000b447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB447 11132 bytes
SHA-256: 601faec5fb0192fce45cdc17844a75f12268c3dc0765837e95c7805c50de1b46
font_01_sfnt_off0000cdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEE 15640 bytes
SHA-256: 7cbff0b8cdbb7943bfa85e8b47374dbc95269eb71cd31e5a97d3cc58b4484776
font_02_sfnt_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1