Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bff17a718147da9…

MALICIOUS

PDF

59.7 KB Created: 2020-11-08 10:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f82fb410851739864f5ae31e4b57242 SHA-1: df92b5cd49801762a6f2d502f40761031296f7ce SHA-256: 9bff17a718147da9c4c264d0d84eb7e9204b9fdcc57c5039ed8ff3e73a4d6308
104 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. It uses an urgency-based lure. 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/123?keyword=aquapro+5000+sxt+maintenance+manual PDF link annotation
    • https://tokenabasefegaw.weebly.com/uploads/1/3/3/9/133999291/1d2dfdbb2301241.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/wuwomabe.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/funozimiv.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/1f4449e0-6657-4f8d-8c8f-9ee7dbacc61c/nemalub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e88160-0b22-4c0f-885e-f292076ac29c/lifolozadapajevefakenix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150c7670-20ed-4f80-ae3d-28bb96ef59a9/62598485162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682f3520-6ef4-4288-a18f-faf64750c3e1/mebadibinusomarerazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04771d70-0bf6-46aa-9b1b-c644561f89cf/24802276181.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/one_big_party_icivics_answer_key_worksheet_page_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9973efc2-2e99-47b0-af69-8043109f86d1/northview_elementary_school_ky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af10fd74-d4e6-4b5e-9c77-c3892825679f/the_last_meow_by_burkhard_bilger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555849b6-345e-4b3c-8b45-2e7d8c372864/79031187674.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5A 5528 bytes
SHA-256: d0bd0a130d332dae9fa6a1032e2c50286fdb782b449f6fc8873e5fe3bdca1965
font_01_sfnt_off0000bd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1C 10780 bytes
SHA-256: 5945e6138a6acb627881b46c7d5f176b5ff47ac394bda0017baa74b97f9e1f06

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