Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c2eb3d2268cedf…

MALICIOUS

PDF

39.1 KB Created: 2020-11-06 20:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 19e8dff3444840512618f62e9fef4f41 SHA-1: d30b06ec506413024f8fb989105d45749700a168 SHA-256: 84c2eb3d2268cedfcb1e4d05f9aebfedeaebe6f5b016fc7865c55ddc6db5307e
66 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffi.ru/aws?keyword=repair+manual+for+2007+jeep+grand+cherokee PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f9ddb964460b.pdfIn PDF document text
    • https://feleluxotikuko.weebly.com/uploads/1/3/4/3/134338959/1f453f75123.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/guxomufasozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8c5fb21bc04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee33995c-516d-4f53-bd8a-b60464db0703/rakaperewu.pdfIn PDF document text
    • https://fogisunewada.files.wordpress.com/2020/11/3413958129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9639e6ed-4ac0-425f-876e-4f07c9c4653b/best_self_be_you_only_better_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84527b57-85b3-45d4-905c-5028aaaf7b33/34792522657.pdfIn PDF document text
    • https://gitiwatubige.files.wordpress.com/2020/11/sebawevefewodujelolelog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2bb2c6c-3a59-4261-b106-e093b5723bfe/51879478569.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CB 5892 bytes
SHA-256: b4c8e3edbf326a85b6519e124f743994dedfc702d86b3d9495b1302856225565
font_01_sfnt_off00006bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 10924 bytes
SHA-256: 7b0e6c26217349dd1e8ac9d8561f02783db5faf509a1d973d22f837d0f431734

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