Malicious PDF — malware analysis report

Static analysis result for SHA-256 8960cacba4a8d0f2…

MALICIOUS

PDF

77.2 KB Created: 2021-09-12 12:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8779147ed25950119018a6717cd517cb SHA-1: 9be40c7befdeb32998521fd89ebba950ee88a087 SHA-256: 8960cacba4a8d0f27ddbd63f2419f757a06c4cac5a9df2e3c85e12db53ddd008
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was classified as malicious by an ML model and detected by ClamAV as a phishing trojan. It contains a high number of external URIs pointing to a link farm hosted on disposable domains, indicating a probable phishing or malware distribution attempt. The presence of urgency lures further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://subded.org/userfiles/file/71593280077.pdf In PDF document text
    • http://togul.org/sites/default/files/file/27450262434.pdfIn PDF document text
    • http://keyday.ru/files/files/jexijunurij.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/geluvolokojelo.pdfIn PDF document text
    • http://screen.by/images/file/wezag.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/dakapamazekomifonuki.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/83573689441.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379c168f033---15677933860.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/xomulukavezalepifazur.pdfIn PDF document text
    • http://theponghop.com/upload/files/93173059838.pdfIn PDF document text
    • http://screen.by/images/file/mabodeworowuvidivutavu.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/kodupolajogasawobuz.pdfIn PDF document text
    • http://immopolignano.lu/images/ruvelowevoxogivaninisigil.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/03/86224097994.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/zajuf.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/gaxisigobugowufapulofek.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/35269074539.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/29313039393.pdfIn PDF document text
    • https://amgaa.org/temp/files/5316517174.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210906081231.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/73420389996.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/widijofesewadal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=super+wings+jett+run+gamePDF 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_off0000c57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57C 18980 bytes
SHA-256: 7565544d5737d9b3c8d72e73ce3615ef94d5670b2c4cecc4a008565825bc34f5
font_01_sfnt_off0000f666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF666 10820 bytes
SHA-256: e8cc3553096b8f15f827340bc0c143b396aaa9fc340766db14cbeab454ce044c
font_02_sfnt_off00010f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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