Malicious PDF — malware analysis report

Static analysis result for SHA-256 881a4d74415d08b1…

MALICIOUS

PDF

66.2 KB Created: 2020-12-03 10:32:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 89105edc88fc0884e5942bb1eb5d96ac SHA-1: d57c4efb54b4e38df77867f2a3b8145ddc983564 SHA-256: 881a4d74415d08b14aa78bcde57d7087e05657f0e4e319f1ba28e766a69f0419
96 Risk Score

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 0.9998

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=compensation+5th+canadian+edition+milkovich+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482872/normal_5fa7f2537abc8.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/mesixadelomomo/74198869779.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/blended_learning_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/kakapewigiwokuwagekutore.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/papa_s_pancakeria_game_poki.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/32412136609.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/negojogovurukobupu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a825a13a450babff6b59/t/5fc6da872ac13f1ee9a97cf1/1606867591866/launch_federal_credit_union_titusville_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b57c14b9-f3e3-4552-be19-0d5735a1b49d/7856384745.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/free_pascal_language_reference_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1b5c32780c533aabc2ff/1606228829089/randy_marsh_i_thought_this_was_america_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ce9e36-1f3c-4143-be76-f772fd01d57b/69917942506.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/rizigolofemudis.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_off0000c508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC508 5452 bytes
SHA-256: 936ebdfe1f4f3102c162fd358513d0102aeb7b912e7be15b7825421fdaa45dca
font_01_sfnt_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 10508 bytes
SHA-256: 038532903b0e52d4474823262192447df1ca2eb915b9dc6c3f0c5a04fa3f1743