Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81d7cd08ea1fc89…

MALICIOUS

PDF

43.1 KB Created: 2020-10-29 16:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3e8fa5caabc5c2e3470bb0852f4770fe SHA-1: 903bc281a1440a8c1f664783d18b5b1c6faf5f83 SHA-256: e81d7cd08ea1fc890ef22b9a4b17c03c510b7de80b2773980958d12e4ec5dee9
94 Risk Score

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://ggtraff.ru/123?keyword=should+i+remove+hp+eprint+sw In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f94e78801069.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/lukebarobeguma.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/takifipagep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f95d9c4948ac.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/tugibob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f8dfdd9df385.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/25ea60fa-ba1a-41c2-a6da-8bc8004581ef/xetolelapiliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0456/4418/5767/files/rakuninuxoperimodok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9095/0338/files/download_vidmate_for_android_device.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc47842-f99a-4089-bfd8-c9856527d4ea/gejevimejokumelet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c759ec7b-e087-4587-bcc3-69e79a1cf2be/tugepawimajovosemil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4729/6409/files/reset_app_preferences_android_oreo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB5 5128 bytes
SHA-256: 997a2ff99911f7080eae7c6cfb2a9b10573c17059bf8ddbee9a6da32c497571b
font_01_sfnt_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 10796 bytes
SHA-256: 232e8967839c7eb60912505b381b5658afff8066b811b4f438a9fd8635d13354
font_02_sfnt_off000091fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91FD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176