Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc0ddcb7150bc15…

MALICIOUS

PDF

70.1 KB Created: 2021-09-25 06:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 993f6e16a196a8dd9583440734e51bbb SHA-1: 0644f009cb66e7b65a2e623144c11da2a6d26e0d SHA-256: 8bc0ddcb7150bc15612a5f22183adb800e67ac6e23dfc669f21832090956d14b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple links to external websites, some hosted on compromised CMS uploads and others on disposable domains, suggesting a link farm used for phishing or malware distribution. The PDF's structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://marklaliberte.com/fckupload/file/dulogetobemuzuze.pdf In PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163088600919.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/wufepojebazusux.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/pakodunupatul.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/lixotelonijotazikuluzu.pdfIn PDF document text
    • http://cochemical.com/upload/files/jubosobirivobu.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/ponekosafimefade.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/fosuzepawovikerisurikiw.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/54264077955.pdfIn PDF document text
    • http://contua.org/userfiles/file/43609059182.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/47384367737.pdfIn PDF document text
    • https://matharu.ae/userfiles/file/zinolas.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/lexisaguzotaf.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/mexibiloto.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/jetonerofebafuje.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/jiwapikevogamefopasif.pdfIn PDF document text
    • http://vina2002.com/uploads/files/14483048617.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33869346812.pdfIn PDF document text
    • http://ippon.lv/uploads/File/marogobezef.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/94e494b4e041f9bbab08257ca68041e4/turexuno.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/wodugunokatuveriwilidozis.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0d11aceb6---bevegerogetitunoripujab.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae78a06822---gozelil.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/271940695.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=watch+jojo+rabbit+123moviesPDF 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_off0000aecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECC 11016 bytes
SHA-256: fef525b51a631e1ba306104566b25b08356099e84a1f33aac0639f71695ba11b
font_01_sfnt_off0000c89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 16004 bytes
SHA-256: fa4fcc1f09513169cd6abff929a033f6835821b87c6b30e18d91730b7fdb6018

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