Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5ac67f3e182e23…

MALICIOUS

PDF

76.7 KB Created: 2020-12-09 23:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0b458c5b4ffb111ca7432f75280ac98c SHA-1: 2d57eaa138d235f358f83c284c366215517737c7 SHA-256: cd5ac67f3e182e23d906acdfd3d1ebe34a2f9d180124d4fd6e14de199b32ff23
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 0.9997

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://cctraff.ru/strik?utm_term=biology+of+a+bottlenose+dolphin In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5fa9e1ae97bdd.pdfIn 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/19b17759-abaf-4158-8bf7-40e26ced2777/disney_gift_card_templates_free_printable.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc646218ef7301f8b3592d3/t/5fc6e6ac0791337046d528c1/1606870701067/rojopotiwawuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e830d97-b42e-404d-8481-3f2e37848643/kirikamozutezavuxofimi.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/acc_aha_guidelines_myocardial_infarction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0b4e32-05cb-4761-8477-b803f2a960ac/el_buen_pastor_catholic_church_el_paso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54cfdea4a794d566240f0/t/5fc9f7bb887b444c615a46b0/1607071678174/turbo_racer_3d_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab964bb-cec1-4abf-8953-2cbdccbedb18/diwowonadozif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454a6dda-022f-4ae4-92c0-177e0735ab94/5569531979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b623f40b-8975-4f23-a630-4c8c9083b095/28839133574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e66427-3db8-4de8-a185-b43eaa3435a1/38375826386.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0887790d063a90a88473/t/5fcec4f1798354522dfbc2b9/1607386353068/sosugemijobotisiwexobi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efc3b8467722f1d478d1/t/5fccfed31e1a4d7de12d55ae/1607270100501/classic_cars_for_sale_in_maine_by_owner.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_off000108ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x108EC 18496 bytes
SHA-256: 74c3230dbcfb79cfad12c10c0e2b71a562322cfe1d174b78f9b7d58db9910056
font_00_sfnt_off0000d368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 5500 bytes
SHA-256: 1891123c533a0ea8bb29825b15035a92a5a27373622a43977900aaec64e98338
font_01_sfnt_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 10068 bytes
SHA-256: 07e2db382f6bd1badaa6e297c911fe35f03f922aa3bddfaf71fe2acd7c616144

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