Malicious PDF — malware analysis report

Static analysis result for SHA-256 653608e804ec0488…

MALICIOUS

PDF

81.0 KB Created: 2021-09-21 02:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: edb6e4028fcceddc1c6a95c497d11f06 SHA-1: 5427ae06efbececa8998946cbf84f7cd7852d3e2 SHA-256: 653608e804ec0488d134b911fdb5efb8f3f46d0cd58d541ae4587ce3cd6e000f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a phishing attempt related to financial transactions. The embedded URLs point to various domains, some of which are associated with compromised CMS uploads or link farms, further supporting the phishing and potential credential harvesting motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=erase+phone+memory PDF link annotation
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75620447553.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/82248078593.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/fegafu.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/63795434750.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/govimitu.pdfIn PDF document text
    • http://elektron.be/public/userimgs/files/68249757193.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/77635822927.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148e1478da8e---41750365947.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/46486680366.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/zetisopi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/gmpvvvosc9tqd10a2dvb92nuph/17529325599.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/rudutuwirawom.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/rabetalojedewimom.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/tupaderalabogomizeg.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/671f99692e32e8fa3c6fd6206dd1fa87/fadux.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614415d44b632---wigupan.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/32245520254.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/vagavuz.pdfIn PDF document text
    • http://zimmerei-possert.at/1294581874.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/vebetixanu.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/87449040955.pdfIn PDF document text
    • http://geotersrl.it/file/27270463689.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/disedamal.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/papadujotafutuwojuz.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/detiwexunipalomenur.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109090301149703.pdfIn PDF document text
    • http://camonetinternational.com/files/file/kanevubukofosapufatujit.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_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF288 10376 bytes
SHA-256: d93aed47be7713bf276ca8646c60f9affb5488ae944070231d734f74f0f26737
font_02_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 17300 bytes
SHA-256: 08b3f938b38dc6f02d4ab1294514a22dee225590b10439a9075e0e7d382b44b2

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