Malicious PDF — malware analysis report

Static analysis result for SHA-256 b170d917e4f9ca8d…

MALICIOUS

PDF

70.2 KB Created: 2020-11-14 11:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fcc4bf545eb7e40392a7b05ab282fe03 SHA-1: 1e04e0291d62f53f40e7a1deccdc89f44b06a9d4 SHA-256: b170d917e4f9ca8d99cd9187d0b9da51bd8d99e6aa5a9ebfefbb48c09a7a4365
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=china+wall+restaurant+round+rock In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb260b0-08ee-4c54-b51e-209d1079e7e5/12899682186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1213e06-55b8-4bdd-b66d-e817061eb715/dallas_county_iowa_clerk_of_courts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb81dae8-e55c-4f00-a3df-3144eb190148/wazibosixisufogogag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b310dce-5181-4233-9a64-bb3fd37751e6/53072946571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a54072d2-bb38-4145-af0c-5290d6825d10/bozedafafab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c2227d-7f9a-41b5-8a32-822e2be31f3c/analytical_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/mumulorajamenuwuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/pictures_of_all_american_girl_dolls.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/disha_bank_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300c3831-f6b2-496c-bcfb-43c2411d32e0/luganugosegedokudas.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/24825916435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145cf67e-ee60-4333-96f6-3675ca1fce74/juwoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39231b46-ddef-4842-ba27-ff2f0137abc5/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8328faf7-85ff-48a0-b96d-03ada101c383/nilikubizariludud.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ef1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF1E 18268 bytes
SHA-256: 32a468b7fd587b457ced80ab4dbc48a8a2987cd6c643c134c722997d2c8a3411
font_00_sfnt_off0000b90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90D 5088 bytes
SHA-256: 387161e2000dfdf6af532a6568be2e0fd752fc96f5a8239567d479348a895ffb
font_01_sfnt_off0000ca60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA60 10612 bytes
SHA-256: 3de6b45de68e05ed475e4160b3d4930f4df817467e49506f1727e0d570458fbd

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