Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c49841cf40c3f6…

MALICIOUS

PDF

97.6 KB Created: 2021-03-30 05:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf4ccc17bb0cbde37a3f876e381cdcd SHA-1: 72e6d62658e7ead7f299b30a68f88b24c293a37c SHA-256: a2c49841cf40c3f61d0d43e0851fcaae8a67a80252ab409af8e51790a4b67fd7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through social engineering, likely as a spearphishing attachment.

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://soxebez.ru/wix?keyword=segunda+mitad+del+siglo+xix+en+europa
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5fe666cc98821.pdf
    • http://fukoxonezadanom.22web.org/41819166099.pdf
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fe5ff8a7ae1a.pdf
    • http://gejejasofubi.mywebcommunity.org/kogewogedawegeremowaneko.pdf
    • https://cdn-cms.f-static.net/uploads/4479470/normal_60206fb919845.pdf
    • http://dedaruk.scienceontheweb.net/78458293636.pdf
    • http://walkover.me/melody_gardot_from_paris_with_love2zh3d.pdf
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ffd66a237775.pdf
    • http://insta-sale.site/synthesia_songs_freesht7u.pdf
    • https://cdn-cms.f-static.net/uploads/4405195/normal_60248d00bfab8.pdf
    • http://murupewobot.iblogger.org/the_boy_in_the_striped_pajamas_writing_style.pdf
    • http://quickstore.pro/51911698818i58z9.pdf
    • http://verification-help.com/delighting_in_the_trinity_study_guideshgso.pdf
    • http://soldonlittleton.com/jebasorobuvulesiyg1o0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gozudil.onlinewebshop.net/alberta_bill_of_sale_fillable.pdf
    • http://najijojovigom.myartsonline.com/59755732952.pdf
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_d27ce4086ff94f0cab64c14b153de880.pdf?index=true
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_a6cdb2c619fd468098ea98f57c9fe9e6.pdf?index=true
    • http://rotufixijisadi.onlinewebshop.net/62630933939.pdf
    • http://lawaxisagiwog.atwebpages.com/stock_market_open_on_veterans_day_2018.pdf
    • http://lobosebaj.rf.gd/act_2_prologue_romeo_and_juliet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a78.bin
7435f93197b1c34899d9579499da8d0a1d721284c3ecc6f9ef5fc1c64044c0f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A78 5448 bytes
font_01_sfnt_off00014cf0.bin
e774aba197d498ff37f4b9773dce571b82bec59e3d833c86051b95bf479cbc78
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF0 13372 bytes