Malicious PDF — malware analysis report

Static analysis result for SHA-256 2508c3b1d1240471…

MALICIOUS

PDF

83.6 KB Created: 2021-04-06 23:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e11d038e237d8ab2e6479b64c15a1d7 SHA-1: d7381297d831473c3c3355661cb980a25cbc043c SHA-256: 2508c3b1d1240471984d8f5ccac0de3d165f941d92aeba8d9286e84792e124a4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing lure related to the document's purported content about an iPhone 7 backup. Although no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest a phishing or scam attempt, potentially leveraging PDF vulnerabilities or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/wix?keyword=iphone+7+manual+backup
    • http://pink-echo.club/canadian_fundamentals_of_nursing_5th_edition_study_guide_answers7d7gy.pdf
    • http://xsale.trade/fozurofutegelw5ped.pdf
    • http://kajuzumanaz.sportsontheweb.net/14339736517.pdf
    • http://lolkek.xyz/74272077570ga4ca.pdf
    • http://larts.digital/838951253150ynyv.pdf
    • http://reform-st.ru/731279315534zand.pdf
    • http://janorewaxeno.mygamesonline.org/88518390084.pdf
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5fc97b50e75e0.pdf
    • http://servempieza.site/97182490219fhy8s.pdf
    • https://static.s123-cdn-static.com/uploads/4450511/normal_6005dc15a91d4.pdf
    • https://cdn-cms.f-static.net/uploads/4374535/normal_60489f80e864f.pdf
    • http://italystore.pro/kijojanejejalwoczt.pdf
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5fff3b593448d.pdf
    • https://cdn-cms.f-static.net/uploads/4476418/normal_606546a81bd63.pdf
    • http://1xbets-reg.site/rosario_dela_divina_misericordia_del_da_de_hoym23oq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_691851ed38694406ac4548c5aca110ab.pdf?index=true
    • https://5c9c3928-af7d-4195-9e43-9647d7263c15.filesusr.com/ugd/508998_a2bba6e774994e539e53505af74f3f6f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5230cfc4-c22b-477c-85a9-d382508920bc/average_salary_geotechnical_engineer_canada.pdf
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_9f4e1b6f736f4f86ab7627f247d23c32.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cb5728f8-997a-432c-b278-e94cd2162305/87695141828.pdf
    • https://uploads.strikinglycdn.com/files/c760a768-2fd7-4ceb-a076-8133c3801f82/682182203.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c0.bin
9cbd8de9db1bf7a11d89b658625e4a67ef8169e848f857740ed2d7139f8b78dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5120 bytes
font_01_sfnt_off0000fafd.bin
94eaf96360dc778d25e77c0192dcba8263a39dfb774274d88e126eb103f55f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 1792 bytes
font_02_sfnt_off000103b9.bin
a6efb71c1c09b42aed0183cc978bc77ec294eac50a22d9b7caecd9f41d4c23b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 11556 bytes
font_03_sfnt_off00012b34.bin
3345b0d77106753ad4ab19a53676392736042f8ff69d0c1f50f05e5b8d9c1f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 16140 bytes

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