Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba6ebc1d9ce8f12…

MALICIOUS

PDF

74.5 KB Created: 2021-02-22 07:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ad2760b144a9728fb361c13a5d18850 SHA-1: 87f6cefc7120280a98f01d6291c356b7aea7897b SHA-256: 7ba6ebc1d9ce8f128d58d66f308fc7e16dc670da15104c8ac91f39f822af8524
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=sinjid+shadow+of+the+warrior+mobile PDF link annotation
    • https://lojanoper.weebly.com/uploads/1/3/5/4/135400197/fudetefunir-bofekap-busowukinukemux.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/misegezixigax.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/iiiPhip/lobamojokejujolenu.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/67c0c62.pdfIn PDF document text
    • https://kusigalodedi.weebly.com/uploads/1/3/5/9/135965864/weniwomexunuj.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/jidutaweti_sasujave_mubiriweg_vejizip.pdfIn PDF document text
    • https://munowimil.weebly.com/uploads/1/3/1/4/131406650/7192233.pdfIn PDF document text
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/zebanekasovevi_zumen_xasajonoba.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/kuxekumubopesitafu.pdfIn PDF document text
    • https://nimugafibe.weebly.com/uploads/1/3/6/0/136084612/fogowinopifajex_mupis_mageweregim_wusubevimodogez.pdfIn PDF document text
    • https://tulofezufiruz.weebly.com/uploads/1/3/1/4/131409090/zasuroxapox.pdfIn PDF document text
    • https://fokinovev.weebly.com/uploads/1/3/0/7/130775288/xexotoge-pituxazetaro-luxureralusut-panoli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/24303515421.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/technology_data_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/64804534025.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/jewibojokud.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/surf_report_bunker_bay_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/sony_dream_machine_auto_time_set_alarm_clock_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/havoc_brother_whatsapp_status_video.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_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 5556 bytes
SHA-256: 3a3d5f3c22507549772a45a62e9d4b62b6125b652c41cc1fbcf32c1b3225bc8a
font_01_sfnt_off0000fb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB58 9724 bytes
SHA-256: fd6421370b5d739a7712a3544e4b75159f95856d7133328df28cb8a2e1e35e92

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