Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea5aa0ecf58adbf…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 05:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0bda7d6a825dc09e5217366c8e03e72 SHA-1: 2b676c859a6ed2fdbe0b1aaa9f985af1a80724a5 SHA-256: aea5aa0ecf58adbf07a42d55e258236e63e9511ea227d45ff27d6a7a07a00f70
196 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a payment redirection lure. It contains numerous links to external websites, many of which appear to be hosted on disposable or compromised domains, suggesting an attempt to direct users to phishing or malware distribution sites. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to trick users into compromising their financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://ketchas.ru/uplcv?utm_term=sms+keyboard+download PDF link annotation
    • https://nevisnews.com/userfiles/47390692768.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/41556318060.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/161394d5a59929---50359907427.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/960823b42f5c5c9e11454a169311b056/dogofenebukajowex.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/zetujusapevis.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/mitonoxuzited.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/nerezujukasegokisiv.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/54827087508.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/ditezatepeniva.pdfIn PDF document text
    • http://uhorder.com/upload/files/mijevofowaxipimab.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/kifabusoveb.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/labex.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/19665235579.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/67851077514.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/65571595094.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d3f6ea35b---90765476833.pdfIn PDF document text
    • https://isigakizima.net/img/tmp/file/83905052466.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/bfc4cb45e1b1545d8fecc0931ab8a61f/bimujodawozizutolu.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210906071749.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/nunujorat.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/tupuzegemalabugonuni.pdfIn PDF document text
    • http://bubb.cn/up_file/file/xisigikifapafakarid.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/zabafinobezebovorenukof.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/jufabijavajojilel.pdfIn PDF document text
    • 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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 10728 bytes
SHA-256: 9e4bac58dbe48c008b0a9634b9e4df0a9d07d7a41022fd5cb70a26bbe64c7a13
font_01_sfnt_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 18128 bytes
SHA-256: aba71e79e3c3d57c59f6f64915b82c459ac12fc662c77132b24e8b0501afcafe

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