Malicious PDF — malware analysis report

Static analysis result for SHA-256 999bf1c7ed54d832…

MALICIOUS

PDF

80.7 KB Created: 2020-12-19 02:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9b79ab0133cf5ce2c16a98687c863874 SHA-1: 078a1ff6c3bf2e4b35ac5722131e633404575e90 SHA-256: 999bf1c7ed54d832d91372d2959a37a6502676f21b2eea1e7dd747d2754d7f1c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Skf bearing housing dimensions pdf'. No scripts were extracted, but the presence of an external URI points towards an attempt to redirect the user to a malicious site.

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/aws?utm_term=skf+bearing+housing+dimensions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fa5050362a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8f06596e309.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/5fcef49fad06677b0d28f533/t/5fd65a0572b1137fa974b35f/1607883270292/a_night_in_compton_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e0f443-0912-4da0-8683-b5e8973d584e/53981587256.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/google_dictionary_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e95cbc-b8f1-43dc-88c7-a3ae5036f21a/93986562825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f81d39-df45-4d11-a188-bccc999396cf/tepuxolipunam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6bb130a-df2e-4eae-983b-354f83907d25/donenatigipob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a488c2-dc1c-4394-b1c3-23e98927c7f3/87210335948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1f31e5-856d-4ab2-aa95-a3fcc9a2b994/michael_cole_actor_mod_squad.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/5885503219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04bb4696-1952-40d5-8253-2e67160093c8/48179191245.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d93d1c8c7413143ea957/t/5fc7a6e1c7c45a5eafadbefa/1606919908119/bbc_horizon_documentary_snowball_earth.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_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 5728 bytes
SHA-256: cc843d4e6c08a082110cae661a895a14941e8fa61f696003a574046f44df9006
font_01_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 11980 bytes
SHA-256: b1acec8a7a65ab715f42dd08bc82488ad676ec107285d7f250276e69a27cc3d6

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