Malicious PDF — malware analysis report

Static analysis result for SHA-256 570a0cf0bea5d70c…

MALICIOUS

PDF

80.5 KB Created: 2021-03-03 03:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 38e2c446d52f635ad2a837ee966c6293 SHA-1: e8023135d8990c11f95fdcf7ddf352abcc297c5e SHA-256: 570a0cf0bea5d70c5b0eedce226f8ebc8f565ad58485ee77cb7ff72ea636e60f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a PDF SEO link farm, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=band+quotes+t+shirts PDF link annotation
    • http://tevoriveterusof.22web.org/lady_windermeres_fan_review.pdfIn PDF document text
    • http://tibetterrier.ru/crown_cdi_1000_no_soundualgr.pdfIn PDF document text
    • http://freds.space/cant_connect_foscam_to_wifinnjei.pdfIn PDF document text
    • http://ses-paypal.com/minozezi6kzqw.pdfIn PDF document text
    • http://fisulapafom.22web.org/briggs_and_stratton_675_series_oil_leak.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/xupiwikevun.pdfIn PDF document text
    • http://masito.space/35183902519v6eum.pdfIn PDF document text
    • http://guxiket.iblogger.org/tofor.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/0b44ead2cf76.pdfIn PDF document text
    • http://sethel.xyz/mans_search_for_meaning_by_viktor_frankl_quotestd2kr.pdfIn PDF document text
    • http://ighelperscenter.com/kupoxatamiwerisepumeg0ddn3.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/jilunuzibitonurilodi.pdfIn PDF document text
    • http://redita.fun/dukuzuleretsj1.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
    • https://s3.amazonaws.com/fezenur/buwinujunaxobobeda.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/5g_beamforming_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/cocktail_party_flyer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/summary_of_daily_accomplishment_report_for_ojt.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/vishnu_sahasranamam_lyrics_telugu_ms_subbulakshmi.pdfIn PDF document text
    • http://pewafup.epizy.com/44360152716.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/10022527791.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/lolelozubesa.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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 4936 bytes
SHA-256: 8a522d2afe762271b2cdae292b9853b245776a4f814048cfd843a19501f6cd48
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 15284 bytes
SHA-256: 716224300847d10af4a912158770e2283060836dfdac1a7bb612b602c52b997d
font_02_sfnt_off000126a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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