Malicious PDF — malware analysis report

Static analysis result for SHA-256 8beae80d1c355b41…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 08:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 56f60dd7d1e6f09bbe0b36c23ad0e58d SHA-1: 793564a1d37c43a7a4bc391e70b65c3c815f8da7 SHA-256: 8beae80d1c355b41f48b6c88817d5a4a2c4081700e499e3f42baa175e10c538f
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to search results or awards, aligning with phishing tactics. The presence of an external URI indicates an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=borreria+verticillata+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5fcc8edcbc9c8.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/kezapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ffec3c827f6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/zudezipimiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/email_newsletter_templates_free_outlook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb5dc6a-233f-40f9-8e62-bac016ad2344/dlink_dir_615_router_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/sisozofanelifudakozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abcf570e-90c2-41c3-92e1-e6dc8b55f184/free_multiplication_tables_1-12_printable_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc4fc64-a8a9-4598-a55c-6106c95102be/73619495502.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/worthy_is_the_lamb_piano.pdfIn PDF document text
    • https://926fca10-1439-4adc-b819-38dad5327275.filesusr.com/ugd/26d6d3_c0ca3b64f9ab423a8fbf4c99e5785135.pdf?index=trueIn PDF document text
    • http://sadamenukovizep.epizy.com/free_bitcoin_money_adder_activation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9b9d25-594c-4f34-a440-1bdac54406c8/losawokemewepulugapoxanit.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/the_data_warehouse_etl_toolkit.pdfIn PDF document text
    • https://d8aee3b0-83ea-4a0d-b8f9-524a85b41d10.filesusr.com/ugd/105b34_069627aa36fa4185b83fd8fa13deb4fe.pdf?index=trueIn PDF document text
    • http://sebilazog.rf.gd/53124575567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2284721-731f-49e1-830b-4b19525102bc/60583933846.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/kujezidegupofa.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://scripts.sil.org/OFLIn 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_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 5080 bytes
SHA-256: 99fa53d85388b70edad7a6554929da0680830ce956f7d942cb6d216f2902e6c5
font_01_sfnt_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 10644 bytes
SHA-256: 56af6a4b1e94a35e05d491617e72d7e3b066ff697916c86b70c397848aa5b76c
font_02_sfnt_off00010ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF5 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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