Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb690b2fdb597fc…

MALICIOUS

PDF

56.7 KB Created: 2020-10-26 06:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 30fc3a6d2917cef44819a61df42104db SHA-1: 1f73026939a1ed9142bf66700ccc618eb438e9b7 SHA-256: 1cb690b2fdb597fc5fdede3cce3207538f9c1effcbe430b72284fb2f6f927e9a
94 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 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 1.0000

Heuristics 3

  • 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/pify?keyword=lumosity+pro+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_5f91938b8849e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f88cb5f4f202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_5f8d35ef53eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8c86a5d841d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f939bfe9a88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5f8d57efa6660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ef8ddb40-99af-41b3-873a-c4c5d5f7a7c3/lesagurupezafowotijotit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd68f6f4-bad6-4919-8f30-7610c081b948/26214522919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84602a0-2c76-45a6-a045-21fb792365c3/demufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ae35c3-2007-4440-9636-c5c4be8d7242/25023288174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2331/0260/files/android_alarmmanager_notification_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/bosapolibojobesoravegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5740/5848/files/specific_rotation_equation_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9616/5534/files/16580835557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcedfaf6-635e-46a4-b7dc-c55e7f16af40/zowaruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f23f7dcb-89f2-4fd0-b84c-784f5491b3be/larorumogexu.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/nazukipemikugedez.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/gelifisopuxafebomof.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/67534711376.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/13956689576.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/wabilivibimixiforeliguvi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D3 5068 bytes
SHA-256: fc6734c6c6973640bf301498ce16e7645a71677224fe8f8adeda51954a082d18
font_01_sfnt_off0000870a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870A 11424 bytes
SHA-256: c639db4b4036a338646ed89e61bff6c40aef1f06fe036322b4e768aa947ccdb9
font_02_sfnt_off0000ad51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD51 17544 bytes
SHA-256: 9b39c9984633470509dafa096cf8743cbbcbe6332def7c19fa22d245e6b27433
font_03_sfnt_off0000c6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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