Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1a632a94f0c483…

MALICIOUS

PDF

71.0 KB Created: 2020-11-13 08:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5d4189bc4f3464b112f4c3a8c4670172 SHA-1: d242de419459df755fa8aa5cfa35b0d180d75d29 SHA-256: 4b1a632a94f0c4838fb9f28b2fd81a213a6852b9963e22c4e94760ffb6a0e467
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=the+room+3+apk+full PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5fac26d53d4e3.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/9584aef9-0968-435c-84d3-08bced4a818d/34022576382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ed60b4-f1bd-4f26-a2d5-37095480259c/85692483396.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/windows_remote_desktop_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7c0f63-d2bc-498a-a2ca-5bc8759ab6f1/8555376136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59a7345-2a8b-4ffc-82a7-1f09cb2fef88/werecreatures_around_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4715ad4d-bd3c-46ec-a073-c39b3c126fff/larugifibibiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b853cc0-7fb1-497e-b004-b70cec31a058/64793000614.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/everything_pachislo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/86311103742.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/29759973473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc06c1d-1ad4-49c5-94ef-3cd3e896cabd/uncertainty_in_100_ml_volumetric_flask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad4101e-3a20-4bb7-ba7b-cf412ec66ebf/89212573358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfef38f-4b08-43c8-a752-097e93a62fce/shiawassee_county_jail.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB59 4788 bytes
SHA-256: c3c64964820ad1e37138eb4d97f0498352884892070daed9c552b678046f80ef
font_01_sfnt_off0000dba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 11116 bytes
SHA-256: 63c1a68393f579b83688d31e9713a935bf87179a956ba2a9931919b2da2edff5
font_02_sfnt_off00010100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10100 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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