Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be0541525604d4b…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 23:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ad056c1237ce2e49473743636e20e408 SHA-1: 12d7731698ea94b773239a8f9a496a4511cfd364 SHA-256: 2be0541525604d4b2badd6bab74343230970a6431d15b350f6c6e2519b425ef7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by indicating the PDF acts as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://hamayeshniroo.com/shop/file/wisisas.pdf In PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/26216958753.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/24696239543.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/72643318231.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/pupolelepekude.pdfIn PDF document text
    • http://lmtechsolution.com/userfiles/47214667408.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/luxukureselasanofugir.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/ximawa.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/fowux.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/77002085992.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/tulibuwurodixolajakida.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/waxiwug.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/80267954222.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/lekereneponugot.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/vedabulomidev.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/42165091217.pdfIn PDF document text
    • http://xn--12cf1djdb6cbcafdbu1f1cudgcc8am4wf7htgd9de.com/ckfinder/images/files/baxaromiwotujinonigivewup.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/7695915629.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/46344334303.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/75861349465.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/923432667.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/jonejogixutef.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/839a635f1c809a317c95c09641f4493a/4525546816.pdfIn PDF document text
    • http://gerocuki.hu/user/file/37893174899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=temple+run+winterPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/75a18a38491e05479cbba130bec19820/xivozowutim.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_off0000dd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD09 10112 bytes
SHA-256: 74b4eb221dc07c9646f4b2d9bc6f649b8904946508a52c917e046c462125cc8e
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 18224 bytes
SHA-256: a8fff2a363b580186d6ca2120de80cc3f0709a9fa285c415efe1fbec0b5a2921
font_02_sfnt_off000122f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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