Malicious PDF — malware analysis report

Static analysis result for SHA-256 184a1905947837de…

MALICIOUS

PDF

72.2 KB Created: 2020-12-18 13:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b4c632d58e782372e9794ab7e03a8223 SHA-1: 0ca290bfdbdce3528c7f778d236828240c376d63 SHA-256: 184a1905947837de9a2a46f71384fea3992d1219835745e37aa90135339410dd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, contains references that suggest a lure related to a game. The primary IOC is the external URI which is likely used to host a malicious payload or redirect to a phishing page.

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/aws?utm_term=chamber+of+secrets+game PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb69dfa6fe9.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/c95b4b60-32d1-465a-a9b8-705124c19f5e/the_amazing_spider_man_2_apk_data_mob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27e9c32-0521-4e73-93c6-05d333e442aa/how_do_we_know_how_thick_each_layer_of_the_earth_is.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/toronto_catholic_high_school_uniforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f612b2-784e-4e51-aef5-19f90edc771d/67053287416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/742cb2b2-fe41-4ff4-8d0d-5bfb0269e143/eddie_bauer_tent_model_eb_30004.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6115afd9-fbeb-410a-a0be-821ee024cd76/ancient_civilization_comparison_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd19bc7a-dd86-46b9-9ceb-a6791b9342a4/wogamin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba186830-1d3e-4a16-945e-25ead9e993d3/fidimemefirimilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cc744a-409e-40b9-9b3f-8b119173833c/jidejugemetijiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c68382-e798-45e1-9aa9-1e8759ae2298/dirarejomufuwuvawadan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a39c09e-ba02-4d14-9b11-8b866081028f/26583109878.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 5060 bytes
SHA-256: bf746c7c123093cef75b23f02122c410395b05b93a8a51cbed954296ecb98469
font_01_sfnt_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 10156 bytes
SHA-256: b0e5e5c597aeb06b9d672f13f425940592d64c41be653a3bdcb9467858b7db89
font_02_sfnt_off00010619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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