Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b47ed5e81369755…

MALICIOUS

PDF

60.8 KB Created: 2020-11-16 22:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b3cdf5b99f0222e348441ea10947285 SHA-1: d48f86493c2dbd2871f59ec29e59f0c66c96a092 SHA-256: 0b47ed5e81369755fa933b5674c4beea5c4a01fae81fe708300ae77a2b963f4b
156 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 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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffnew.ru/strik?utm_term=manual+hand+coil+winding+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5fa722041200b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f93b44a3bf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_5f9750375c79a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472206/normal_5fa494eaa8558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f8759d6bb1c3.pdfIn PDF document text
    • https://nixejovebomir.weebly.com/uploads/1/3/1/3/131380485/4341180.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/78262a45-2591-4dea-9f2e-83751fca4871/69059340884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9544cb40-2aac-4a9a-b833-482fe2ef5552/phim_bo_hong_kong_than_dieu_dai_hiep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6596627b-388b-47d6-80d5-31867cbda52c/lesitekus.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/45729499482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b691cad-4fe6-4e98-8fce-e6487288ee05/87036197691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ba8d0d-fc35-4442-a683-dab613f7a2d4/elevation_certificate_cost_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b52acf4-c3b8-4035-8cbb-430b1b1cf483/mananikejojedifufagok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b80efe-90e5-4899-9576-99b0518b3bdc/cretsiz_kovboy_filmi_indir.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_off0000b3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BB 5176 bytes
SHA-256: 372cbb2351f7de02db6cdbf72ca50f1d6ee5a90376a2e0c0c0bc70a8ec70a630
font_01_sfnt_off0000c551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC551 9664 bytes
SHA-256: d4f0be3ac1f51aaa517d6eb457afd9e48ca3eb02cad15afffecd7ba4f2908c77

Open this report in the interactive analyzer, or submit your own file for analysis.