Malicious PDF — malware analysis report

Static analysis result for SHA-256 3358cbacb964b819…

MALICIOUS

PDF

71.5 KB Created: 2020-12-14 22:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4e769591f2b79632bf810d612a91b809 SHA-1: 929891dae0be4d0bdf4e287026e90f13ac8a3bde SHA-256: 3358cbacb964b81976c62013d004f6cebcaeb9423fc374c36c856ea1c255d1a5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for malicious redirection or payload delivery. The document's content, though partially obfuscated, suggests a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=esl+worksheet+on+e-+grammar.+org PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372955/normal_5fc5265940c25.pdfIn PDF document text
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/e8e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fb4c6c3ac7b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5fd389ff792f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418383/normal_5fce63c1e34af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_5fb48bbeeb69d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f8e4f98375720d7ec2d/1606377359222/takuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/351015b1-7221-4d2a-9593-992420b32ad0/16403297446.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/bumederuvipunadafifile.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/62012938233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28897d8b-774e-4421-a669-fd8767cad95b/83143915009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc9c923-94d4-45c5-b60f-930c66712657/genius_hour_ppt.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52f52dd96f5918e5850b/1606374134190/40530311101.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_off0000d7c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C6 5276 bytes
SHA-256: 0e734dd0b12cd6f06ea1cb6d3169056b43ecfbe264a5a2650987b77465de8448
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 11216 bytes
SHA-256: 30d0432e09542e1a3a36757c97faa54756dc26d3ec9c3d61565eb844e8195c11