Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeddc54c0cdd2d3e…

MALICIOUS

PDF

93.4 KB Created: 2021-08-13 01:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b671c555114cc329e304a96323cd15f0 SHA-1: d589f64c72fad35a97e5cd923e06b80086296db2 SHA-256: aeddc54c0cdd2d3ebb60618c58cd053dabfbf7124da1b557c5cd70d441bac5b7
176 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a credential phishing lure, specifically impersonating PayPal and directing users to update payment details. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it functions as a link farm pointing to various PDF files hosted on potentially compromised or disposable domains. The primary lure involves a link that, while appearing to be from Google, redirects to a URL associated with a PayPal impersonation, aiming to harvest user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+time+does+direct+deposit+hit+for+first+convenience+bank.
  • 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://spreewaldatelier.de/img/editor/file/33094001611.pdf In PDF document text
    • http://charivne.info/images/file/weguwezuxonomotubomugibet.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/nafujosesoso.pdfIn PDF document text
    • http://citygclub.com/ckupload/files/31324664532.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/lefubopavapivu.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/39001897882.pdfIn PDF document text
    • http://imi.vc/upload/files/jefoj.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5c8b42ee3---dapekik.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/jovekek.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce819e6d5a7---rowasatutepofonimaw.pdfIn PDF document text
    • https://sanidom.pl/img/file/87499769869.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ikeau1toi871o8m29a677pcmgt/3785571508.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cd6573bec---dotapivixejo.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/subaxevi.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca91ae0d7d---52660658024.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb061a619f39139a8191cdda953471b9/kurutipilovelekokimutuk.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2bfd9b785191463a9f790db59dbf83a4/76439686900.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/vilajamufusetajasaderife.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1a7d4ace3872db373577cf4b35f943df/58752553268.pdfIn PDF document text
    • https://basisangka.com/contents//files/17442531068.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/moxijipizikejamebaxes.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0894b6ee335f39ab08bc2a21085b46d2/31932850463.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/18903633669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+time+does+direct+deposit+hit+for+first+convenience+bankPDF 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_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF1 11132 bytes
SHA-256: af91a383422832692a40b28c1a2ec0f32b012403356c7a89dfad6bd89efb58e1
font_02_sfnt_off0001388f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388F 17740 bytes
SHA-256: ca7425ab536b1683d945346805a20d8892bcc0dbcdfe3c2f5c68c9b8334a1429