Malicious PDF — malware analysis report

Static analysis result for SHA-256 d941aab46898a463…

MALICIOUS

PDF

86.4 KB Created: 2021-02-13 21:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 025397184b86ae806fc977544a90e18d SHA-1: bde5af9d7711ad7e6f604895016c49592eb0067e SHA-256: d941aab46898a4630f821fcaddc16fff1751d421e690684aaaebce2c8fef3199
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary purpose of redirecting users to other sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded URLs suggest an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=d3+bubble+map+example PDF link annotation
    • https://cdn.sqhk.co/dedogupazib/igWhcK6/mechanical_keyboard_kit_hot_swap.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/8588dbd58d34103.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/jiPBjdk/tataxafemidifutigupevud.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/RDJvnRG/run_run_as_fast_as_you_can_shrek.pdfIn PDF document text
    • https://penotogales.weebly.com/uploads/1/3/1/4/131438478/puvalobejarusezap.pdfIn PDF document text
    • https://sesubovokur.weebly.com/uploads/1/3/4/3/134311777/305558.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/sikavewanu_ruxivivi_kugevarejifar.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/hejeLig/98039608986.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/5334389.pdfIn PDF document text
    • https://senemoribut.weebly.com/uploads/1/3/4/7/134703027/batodepesarasusuk.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/149910.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/kobigopisi.pdfIn PDF document text
    • https://bokesavuxi.weebly.com/uploads/1/3/0/9/130968985/litovurosisap-kuxozasuditabe-zusabureja.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/jifesu/eat_bulaga_scholarship_2020_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/possessive_apostrophe_worksheet_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/geely_automobile_holdings_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/lorada.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/ppt_flowchart_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/30_day_moving_notice_template.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/social_media_content_plan_excel_template.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_off00010993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10993 5060 bytes
SHA-256: 898f333c2b2a6ddd6a4ac923b4db35d25e79f8d7c368affa38c6c0bba4fe0286
font_01_sfnt_off00011ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 15900 bytes
SHA-256: d08cabda0ff954685431fe7d535d3a7caadeb2d9819ed18f911b1370beef7643

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