Malicious PDF — malware analysis report

Static analysis result for SHA-256 e883000c2b44586a…

MALICIOUS

PDF

69.2 KB Created: 2021-09-08 21:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a3670e1d18da632354718dba31e7a12 SHA-1: 22aa2282e6fae33a884e494fad62380bed4bb4a7 SHA-256: e883000c2b44586a644db1728e41740475fb8b8690d0b6dac23a31503287475d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous external URIs suggest a phishing or spam campaign aimed at driving traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://platypusspot.org/uploads/ckfinder/userfiles/files/wixubiginozaguzomaborojo.pdf In PDF document text
    • https://angelsforwarriors.org/userfiles/files/99548404281.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/51375186534.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/92282286154.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///36570876526.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/17048637901.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/54536440255.pdfIn PDF document text
    • https://lawtutors.co.uk/js/ckfinder/userfiles/files/78206712203.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/mapawevak.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/38956795782.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210904055524.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/29281903251.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1ffd95a5---poralukajaguzofiwoz.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/xusuzomerowa.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/lozozexolujoxolef.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/rodaveduzek.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/wiremewaliketoter.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/silutirek.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/kokakalejiwomorelid.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210903150644.pdfIn PDF document text
    • http://asfalon.com/__files/file/xetubarewojulu.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/wizitamigok.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/pagemoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=real+gangster+crime+hack+downloadPDF 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_off0000b06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB06E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC880 14900 bytes
SHA-256: 6eedb83192e50a5e3a77fbda524201f8f869217d129e16893310e80d6f00e845
font_02_sfnt_off0000ee0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0C 11040 bytes
SHA-256: 958b0a838d0490ad08ed3641ada849fe800372a78e9618833c2171297b21eed9

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