Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26b3f8fec6e5cfc…

MALICIOUS

PDF

77.9 KB Created: 2021-02-18 20:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7cfba905835b53c399dfa3773f941552 SHA-1: 97e6f75ffd362521fe198b030b7c91a62f5d3146 SHA-256: b26b3f8fec6e5cfc53843ef5d9cf029234d9022db956a1f66f221eae54dcd795
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on file-sharing services, suggesting a link farm or phishing attempt. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

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://jacksth.ru/123?utm_term=power+of+positive+thinking+quotes+pdf PDF link annotation
    • https://tinulesuse.weebly.com/uploads/1/3/4/6/134689832/bitakifonobote_miwuli_xadozemusazuz.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/1d0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_5fd76cf70b25d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390996/normal_5fe55ee13c2d7.pdfIn PDF document text
    • https://tinedejoditof.weebly.com/uploads/1/3/5/9/135971312/lokupadaperifu.pdfIn PDF document text
    • http://majelogajizivo.iblogger.org/alberta_education_curriculum_guides.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_5fd2dbdb206d2.pdfIn PDF document text
    • https://fejilexa.weebly.com/uploads/1/3/1/1/131163980/5676470.pdfIn PDF document text
    • https://fanamiwa.weebly.com/uploads/1/3/4/0/134013174/ded69433bcab118.pdfIn PDF document text
    • https://motixovelubebov.weebly.com/uploads/1/3/6/0/136085904/gepotanal_gisema_dozekonupijev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501054/normal_6018cacfe1113.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/984a237b5c12.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/bivalotewerezo.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/zexugiz.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/musokejixami/povakowetawogonar.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/expanded_noun_phrases_worksheet_year_5.pdfIn PDF document text
    • http://nejetetivapane.epizy.com/ziluxamazajafosutaxemev.pdfIn PDF document text
    • http://vininotubosom.epizy.com/vitufolivikiduri.pdfIn PDF document text
    • http://fatifosavo.rf.gd/62574621048.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/psd_templates_free_wedding_album.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/unknown_battlegrounds_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/scrabble_word_list_cheat_sheet.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_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 5404 bytes
SHA-256: 9235f9ba5b884231f9cda59d1085204e2526329289e2aed6fb106d26c033d506
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 11024 bytes
SHA-256: fac6cc7912ea8e77fccb4af5c10b3e64ab8de442b0b239acb0bfdf1e537c0cde

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