Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f642e569370177…

MALICIOUS

PDF

225.7 KB Created: 2021-03-30 23:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bcb1d771850dcc7deb0e20a6da48c181 SHA-1: b464ee322ae3ba783858a30a88b81ccd6b332db9 SHA-256: 23f642e56937017754816bc0f5ea89cc42063abd69def684c25e675fdfb558b3
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing lure. The embedded URL and the SE_BRAND_CREDENTIAL_PHISH heuristic confirm the intent to trick users into providing credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for exploiting PDF vulnerabilities or embedding malicious JavaScript to facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9643

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vitudanowule.weebly.com/uploads/1/3/5/3/135341415/8027299.pdf.
  • 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://nipisod.ru/award?keyword=ethnic+conflict+in+sri+lanka+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6056b63c723b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_6031595d66cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_604dbee44570e.pdfIn PDF document text
    • https://vitudanowule.weebly.com/uploads/1/3/5/3/135341415/8027299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_6035942b24b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_602ea14c8fae9.pdfIn PDF document text
    • http://rajulikarizamu.iblogger.org/bosaleritusi.pdfIn PDF document text
    • https://gawinesiti.weebly.com/uploads/1/3/5/3/135383431/6034842.pdfIn PDF document text
    • http://mowisadewojapu.22web.org/dutofanuxuzamadaji.pdfIn PDF document text
    • https://kiwaposuxixu.weebly.com/uploads/1/3/5/3/135329520/jilomebepixadosizox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tokavazeweg.epizy.com/netbeans_ide_for_mac.pdfIn PDF document text
    • http://balesalefune.epizy.com/biwavave.pdfIn PDF document text
    • http://muvabeso.epizy.com/98525227803.pdfIn PDF document text
    • http://jitoritobo.epizy.com/99841997949.pdfIn PDF document text
    • http://resaruxowepu.epizy.com/baidu_wifi_hotspot_for_pc.pdfIn PDF document text
    • http://rakorasalonolit.rf.gd/14751169756.pdfIn PDF document text
    • http://zixabolixugitu.epizy.com/38492517888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e46722-2214-4660-8e9e-1bcdbbb760c8/epson_xp-400_manual.pdfIn PDF document text
    • http://geralumumavol.rf.gd/62312678727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b49c3d3-c5f6-45d2-a3d3-0e681009414d/zurofapazefagox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6970a4b-4102-4951-aa9e-5a713d981f68/tokyo_ghoul_season_3_does_kaneki_come_back.pdfIn PDF document text
    • http://davidajepini.epizy.com/current_affairs_in_english_free_download.pdfIn PDF document text
    • http://girodoge.epizy.com/19826145179.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
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F89F 5264 bytes
SHA-256: 2be5e186de5e35c56c9a771d44e8b1920c90558dec6cdfd6d261f12de22b89c5
font_01_sfnt_off00030a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A82 4892 bytes
SHA-256: 25aa00f07a264f6b8ad7e8caa4886cf67889735e255e59f1061b3b70b893c551
font_02_sfnt_off00031bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BB9 9408 bytes
SHA-256: 1685b1761a8d6d99a046c45be1cb33dd33575ddfd90bb91b1df808066b1fd58f
font_03_sfnt_off000337e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337E1 12304 bytes
SHA-256: f947e2ecba9bfb4cf2082a61000eb0e94484cfa05e3b0f073fc60e60f22d86cd
font_04_sfnt_off000360b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x360B4 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8