Malicious PDF — malware analysis report

Static analysis result for SHA-256 e335b527eba6b0c2…

MALICIOUS

PDF

77.7 KB Created: 2021-05-02 01:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bb475bd23f9fe0eaf1c575ffd6533c62 SHA-1: 2e020a8a403c54025425928e5deacb048c349775 SHA-256: e335b527eba6b0c29d063ae9619106fbeae4563f25dedd3de56b41195b7edaff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a phishing site or download further malware. The presence of external URIs and the link farm heuristic point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=mercruiser+4.3+alpha+one+starter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386084/normal_605a718a2bd0d.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/24320527271.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/english_creative_writing_worksheets.pdfIn PDF document text
    • http://duxeluwezix.iblogger.org/rockwell_factorytalk_view_system_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/UQtgiii/62754990951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_6013e8ed522c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_6031579410a23.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/3Cbknih/devaju.pdfIn PDF document text
    • https://cdn.sqhk.co/kubafipefo/fuibhcc/neutralizer_muscles_in_a_push-_up.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_600baf090ee4c.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/zewozofabiridusekenoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_60301a3f47c97.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/gurigoloxawizidobu.pdfIn PDF document text
    • http://razinotadoxali.iblogger.org/wexedeseke.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/nfrjhji/kojetoso.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/aTVDgd1/nijunisazapedawibizi.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/hrkdEJk/55860797565.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/dHahdhg/factory_farming_industrial_complex.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/sat_test_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwojewemuxa.epizy.com/31486935001.pdfIn PDF document text
    • http://genividi.epizy.com/pusomasiram.pdfIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/production_d_acide_sulfurique.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 5312 bytes
SHA-256: 164e19d70550894369123b78259bab56efb24e2de6ecb372e89e0138a608bc72
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 10656 bytes
SHA-256: e039da1186bcec7ab285deddc3009e2bb198bf927ade2b05c2472559ccc3d66b

Open this report in the interactive analyzer, or submit your own file for analysis.