Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f0c37849eb5b0a…

MALICIOUS

PDF

86.8 KB Created: 2021-05-28 02:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf3003b5398a8268404f1934f03d751c SHA-1: 139045f52e7d6291fde713f69236a53385870f09 SHA-256: 78f0c37849eb5b0aa89cc6ab690ba0527edee33a0b6f21bc6c8783c45b5e2949
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://jumiwimov.ru/123?utm_term=catholic+social+teaching+human+dignity+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fe8f8328dc32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd065ba8deda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_604f83fed208f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_60157ee416c23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fdf5de79df21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_6054647378b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_603340d211f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_60157ed2b9010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413118/normal_6015661db3f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_605479ffe8db0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496001/normal_5fee7828cc77f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_606928f7aca0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_606bd436937a1.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/41d09f62-817a-48fa-885f-d3550230bdcf/simple_distillation_lab_report_discussion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f284bd-1412-4270-a50b-94ccfab0c2ec/newerofonawazatenezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc973fd-e031-4f6c-be37-269e66e55b40/how_to_pair_bluetooth_shower_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c803778-3509-4940-842b-eb6415a713c6/how_to_make_your_own_cattle_feed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acc6cc6-7078-4961-a4e1-3f907723c3f2/craftsman_25cc_gas_trimmer_spark_plug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abb041c-6c67-4c8d-8460-82a7d92801f4/83864873502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d552f2de-e4dc-48ba-a56d-be79364778ff/jabet.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_off00010438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10438 5480 bytes
SHA-256: 83ba5b6d3ebcec983cfa6228a7b44ae352e879dcc66d3bd4020f48e4046beef6
font_01_sfnt_off000116c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C1 11972 bytes
SHA-256: b39b878cc2593e15feb01e7433a71c15fadb73341b3fe850e0e5aaa6e0c73e51
font_02_sfnt_off00013f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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