Malicious PDF — malware analysis report

Static analysis result for SHA-256 622ff94cc6534857…

MALICIOUS

PDF

187.2 KB Created: 2021-04-26 07:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f4c19807e56d71551afef52ad0aed334 SHA-1: 7bf46f5c24a6813a961cde8ee6a297243db0654c SHA-256: 622ff94cc6534857f4b70992626a94673afb1dea3737efe67bc6c43fed7c1081
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and ML-based detection. The document contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting an attempt to obscure the final phishing destination. The primary lure appears to be impersonating the Chase brand to trick users into clicking a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/panazudub_jituvux.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=what+is+associated+dependent+development PDF link annotation
    • https://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/panazudub_jituvux.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/fujowibodoxoded_mapusakixedaxa_fubuvumisalef.pdfIn PDF document text
    • https://libosimi.weebly.com/uploads/1/3/4/0/134000241/jejepezofe_ponemef_lipupofisa.pdfIn PDF document text
    • https://nuviwusu.weebly.com/uploads/1/3/4/4/134486429/876ee.pdfIn PDF document text
    • http://jinitevuwug.iblogger.org/anyone_can_learn_to_draw_in_5_days.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/autodesk_dwg_trueview_2020_export_to.pdfIn PDF document text
    • https://gigadejelurare.weebly.com/uploads/1/3/0/8/130874533/mevavew.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/alcatel_3l_spec.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/71cd7.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/bedubeveripov_voxugakot_nusumonixuva.pdfIn PDF document text
    • http://tizadejaso.getenjoyment.net/salient_features_of_academic_writing.pdfIn PDF document text
    • https://kabibejago.weebly.com/uploads/1/3/6/0/136050231/eb826f9.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
    • http://teropisarazo.myartsonline.com/vorujizajof.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_aa70ca925395431f92265a252f62a992.pdf?index=trueIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_a14e0274edd6412e9b4b4e76bae2635e.pdf?index=trueIn PDF document text
    • http://gajopule.myartsonline.com/poriwilawadolabadesome.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_f380dc9718734f57aafc1fd5b292fad0.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_a342ed99e41f4387be8b5f4507933fa8.pdf?index=trueIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_8a7d331b7bc8451ba58cdb0f1e526886.pdf?index=trueIn PDF document text
    • http://fugirar.epizy.com/77322998602.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_19e8822195c94510b71cb16aa8bae011.pdf?index=trueIn PDF document text
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_08bf76c35fa04982b53f82d32caf903a.pdf?index=trueIn PDF document text
    • http://dukidejulorib.epizy.com/bisaya_christmas_songs_lyrics_with_guitar_chords.pdfIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_3eda037bd8944ed38681d113f627b083.pdf?index=trueIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_41e2ec05237e47a58682612abc3be049.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000281ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x281EA 5076 bytes
SHA-256: 1632ac20a736f7d186f47c1637c1da5f1c0d4e65364ddb5ea55a052370991f9d
font_01_sfnt_off0002930c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2930C 12588 bytes
SHA-256: 905a4b22a344b886af3cf9707df287631b349d0ec126cd174244c9d24d97e380
font_02_sfnt_off0002bb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4D 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off0002cfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFE7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34