Malicious PDF — malware analysis report

Static analysis result for SHA-256 1245c1580a8fc53c…

MALICIOUS

PDF

102.1 KB Created: 2021-03-24 10:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a3c4c1933765e8f2c0fff2c14aae50d SHA-1: 42d9ccd46d94db31bcb60893f68a51abdb9cab5f SHA-256: 1245c1580a8fc53cb2f8312b0fc11e1a1e08bf70d636da115840df327ed30ddc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to occupational therapy to entice users to click the malicious link.

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/wix?keyword=occupational+performance+issues+in+occupational+therapy
    • http://fusojosejivo.iblogger.org/tajozegazivoluleramakum.pdf
    • http://resikixi.iblogger.org/mufesisinoxuwozixelabagus.pdf
    • http://magicwoolshop.com/big_7_division_anchor_chartcm9yz.pdf
    • http://lnstagram-help-businesss.com/18838593532gc3z3.pdf
    • http://jurexulekuw.22web.org/story_elements_sort.pdf
    • http://tisibodonal.22web.org/vekubalitadip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b53c1f3e-7140-422f-a3db-27132ed99efc/how_to_unlock_baofeng_uv-5r.pdf
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_5b07d89147e14c7481733774c5fba22e.pdf?index=true
    • https://s3.amazonaws.com/tanapilamaxi/7302289188.pdf
    • http://temimepizunosaf.epizy.com/introduction_to_spherical_trigonometry.pdf
    • http://zovixiluru.epizy.com/lorain_county_court_docket_sheet.pdf
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_49a46a602ac447e4be3996e88ba17cb3.pdf?index=true
    • http://junusesofuxog.rf.gd/how_to_show_nationalism_and_patriotism_at_home.pdf
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_fea3a3d123094c7792e4e4717e1b7275.pdf?index=true
    • https://d7504aae-3d37-493f-8789-a5629a6fcc30.filesusr.com/ugd/7ca9f5_542cb140f461461b8ed285e257664d9c.pdf?index=true
    • http://melukibojenubud.rf.gd/hunchback_of_notre_dame_name_pronunciation.pdf
    • https://s3.amazonaws.com/jugobimuraje/zaguref.pdf
    • https://uploads.strikinglycdn.com/files/6c80f87e-9a65-4527-808a-819d73c46e90/5_languages_of_love_audiobook_download_free.pdf
    • http://govabipisu.epizy.com/76846849943.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001432b.bin
e05ccda8d92d7ec56780880ebcbe9504cd6d2ca0bf7f9666dbfce9a4e4ca2e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1432B 5264 bytes
font_01_sfnt_off000154e6.bin
f7cb5506454cd4e45ff7574ead1df151372afd47dde98e2142080d6645425e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154E6 11112 bytes
font_02_sfnt_off00017af9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AF9 4324 bytes

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