Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0280948d11c4a9a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-23 01:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98e7c666a9f26c94609ca167f8d07aa4 SHA-1: 549bed7b803f10a3aa56a99d32e28a88c0d0943e SHA-256: f0280948d11c4a9af48b03286c475ccb03dd061c104b098a41c13e13ed90ddea
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are structured as link farms. This suggests the document's primary purpose is to redirect users to malicious websites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://twozonechickenlasvegas.com/uploads/files/52711975946.pdf In PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/27286584190.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/28072367526.pdfIn PDF document text
    • http://vtaky.sk/media/file/30671107523.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/ranurobaxijisofibupiriwaf.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/bopafekuvowasitan.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/binakaxulepusazusuwagujoz.pdfIn PDF document text
    • https://kvizek.excore.hu/ckfinder/userfiles/files/21046682086.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7b632830---40820079311.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/fapoxinusoduvelomodefa.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/16900484702.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/44507475851.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/57050942396.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/59601784911.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/morub.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/zifebewopazajuf.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/fesulebewarozujiso.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/18419152082.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f159ba2696---niselavuloteluxe.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109230528367587.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/78335554947.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/53090686900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=shareit+apk+new+version+2021PDF 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_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 10916 bytes
SHA-256: 800ad2d8b9086152caf8471750e2478012271f967a678db945064b3e5901ebbc
font_01_sfnt_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 18952 bytes
SHA-256: ebd99cecfc77983498b233c8d54019414f00ea8014021d3ed240a99cf6e72c64
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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