Malicious PDF — malware analysis report

Static analysis result for SHA-256 963294c7cbaab345…

MALICIOUS

PDF

64.0 KB Created: 2021-02-20 18:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b9997e32a9fc02c63974f5b3ac9fbcd8 SHA-1: 7374690a0237ed3afc9d62635d57cb95705f98ee SHA-256: 963294c7cbaab345e5fa2ac704a58b3b0c0c96f2c0da6567f55aca9c46ad6a01
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jottigo.ru/strik?utm_term=is+h%2526m+better+than+zara PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453537/normal_6028f20690fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490380/normal_6017b34522589.pdfIn PDF document text
    • http://verifybadgesbusiness.com/legends_of_runeterra_cards_wikiuayjr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383804/normal_5fca3df041716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_602c6c303f92d.pdfIn PDF document text
    • http://triple-doska6.club/wewodutomyjzyi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_60176b9d6b2e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_6020a1c57dcba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_5fe969c2d9323.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://fipuxogililego.epizy.com/twitter_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/lukanik.pdfIn PDF document text
    • http://lokikigufam.epizy.com/zixolunob.pdfIn PDF document text
    • http://mulazukaga.rf.gd/biometric_authentication_methods.pdfIn PDF document text
    • http://gagoxapedako.epizy.com/85586916399.pdfIn PDF document text
    • http://tuserigetov.rf.gd/lugunokagesevubisuxozojov.pdfIn PDF document text
    • http://rozazidugo.epizy.com/firefox_49_version.pdfIn PDF document text
    • http://duxejuxaxeze.epizy.com/sample_affidavit_legal_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/vs_code_python_format_on_save.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/46390427616.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/brightness_driver_for_windows_8._1_hp.pdfIn PDF document text
    • http://lebiwubeso.rf.gd/viwebomilubixuru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FA 3696 bytes
SHA-256: e23f446c810de8b3e8fcee8db03c1e9e28fb029fb762d8cb90796aacc653b2e5
font_01_sfnt_off0000c54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54B 9620 bytes
SHA-256: 9ee9101c461181da57a0ba298a56d980f3713b075de8e94147cf6992794b451c
font_02_sfnt_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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