Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f949a789d33181…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 13:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0725b0988638b92d492052c433ef3a46 SHA-1: 37c562d43eebec5e27bb4dc13de4020ef8e60691 SHA-256: 34f949a789d33181906029972ff979c10c19ba45156d5c736b2d4cc0f3171b84
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'lab safety and equipment puzzle worksheet answers'. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://nipisod.ru/wix?keyword=lab+safety+and+equipment+puzzle+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388629/normal_6021e81d5f8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5fdbe4fc7199e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5feb5e4baf4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479691/normal_5fd636c06c27d.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/sjcOgdW/android_tv_box_launcher_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/7Ejd9HV/48970569840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_603a98f4b4118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_5fd0e6034494c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fd68d8b64e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5fdc12b2cb764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471703/normal_5ff85bab0fbf5.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/zuvovoxigumuz/jowijawaxowosisudopukalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d982f015-5349-43f6-ae3b-34ba84181fdc/duchess_of_malfi_critical_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa637528-5dc7-42d2-aa97-ffce2d172841/on_the_road_movie_watch_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/fios_quantum_gateway_router_g1100_red_globe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec93019-0ae6-46cb-9db4-40467ba0c1d1/rosetta_stone_faq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b2d5d0-72b1-4bad-9c02-a565e72521cb/dekoketig.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/spacedesk_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852438de-92a5-4e1c-8b06-0d980274302f/unitedhealthcare_mississippican_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/52662239310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f57790-fbb2-4fdb-bc94-7c71d93fac45/where_is_1_police_plaza_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b534eb-4054-436e-a55a-bfa673fefbde/batati.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_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 5796 bytes
SHA-256: a1626f4d39115ae24a463df9dda102cf0b1b5006c67f614a031191ee9bd8f7c0
font_01_sfnt_off00011f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 11528 bytes
SHA-256: cd98ad64e0e7ec231ebc88d87cacf6aeae26d37208e631c69eedfc8e13b32f8f

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