Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1dda171fedd4135…

MALICIOUS

PDF

70.6 KB Created: 2020-11-12 21:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 42dd84772f7172ccec0e7bfaf1a9fbed SHA-1: b9e9fa34ebe6457bed9fea99e9819200abf72a28 SHA-256: a1dda171fedd4135426308a4def61ec26003800fc400459017a6f65dd04f66df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised as a search result for 'astronomy laser pointer uk'. No scripts were extracted, but the presence of the malicious URL and the strong heuristic detections indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=astronomy+laser+pointer+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f9cd0f3910b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5fa0a81fb345a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8c00bfc80cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87083033e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f92dedc94d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f9da846ae2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f9da3de9f1d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5faa19f92dbf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/business_plan_sample_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d14d23-68c8-43ba-9127-8d013c08a791/78013740804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c5eee2-0f50-4044-b527-9fe9e3412ae9/12729048017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656001b5-58c2-4ab6-807b-a5c9276e1c8d/17555773553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbd88ce-e6ec-4f4e-9496-04cc9faa91d5/96516153301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cf5c53-7741-4b2c-9905-ef2d0bb986ad/wugokexabatakov.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_off0000d9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 5120 bytes
SHA-256: 20214a33f853d74a5739d4abf417c0577b8c625f4dad30922ea800f0be2d3534
font_01_sfnt_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10244 bytes
SHA-256: 00128eed360d4115c5e786481cb832bd24c964aef292c3aa9584c627d06ff64e

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