Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5deedb4304a47b…

MALICIOUS

PDF

95.5 KB Created: 2021-04-04 10:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b4774d1ece572a648ac7612f787fe62b SHA-1: d59a1e0cef92e1d813ad3eed44fab69285e2b97c SHA-256: 5b5deedb4304a47b34744290ffa641d146103cada02f9265d0ea969e8559bde1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a significant number pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure strongly suggest an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://dugedepap.ru/strik?utm_term=what+is+the+best+tension+for+a+singer+sewing+machine PDF link annotation
    • http://gaximivotekole.mypressonline.com/xemewelemepubupol.pdfIn PDF document text
    • https://cdn.sqhk.co/xixofivib/ibVjbEJ/15530664268.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/lhhiaic/11stone_9lbs_in_pounds.pdfIn PDF document text
    • https://zunotebizi.weebly.com/uploads/1/3/4/6/134648513/438376693.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/ijbcXij/zinawibumam.pdfIn PDF document text
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/pagad-ziwaxapa-zebigurox-rulagipikubi.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/managing_political_risk_in_international_business.pdfIn PDF document text
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/jexesizuvino-sevajavudiba.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/GgcRhjn/kodobuxutarifez.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://wutesejib.onlinewebshop.net/easy_stone_soup_recipe_for_classroom.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/la_rams_injury_report_week_13.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/4mhz_crystal_oscillator.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/wemakamafiravuwutaretarom.pdfIn PDF document text
    • http://naburonip.myartsonline.com/asp.net_mvc_302_redirect.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/82974786380.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/29359297912.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/chat_apps_for_iphone_and_android.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_23f128df3eab4332ba3c432361f4a942.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/rider_waite_tarot_meanings.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_6916811f25d74c51ae22009f4347b492.pdf?index=trueIn PDF document text
    • https://e1213f85-9714-4753-9c1f-0959a36ed6a0.filesusr.com/ugd/12dc78_a310de9560254aa3b44564703742160a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/koxidez.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_off0001297a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297A 5296 bytes
SHA-256: 49e70fed3abacc3d559d61827b5203d376bfae66c62e71ee7aece96216b16715
font_01_sfnt_off00013b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B59 11176 bytes
SHA-256: b8270dbc5e0179cad585b0667a109caaf8dfb0d632bdb014c9a81bdc4fabe100
font_02_sfnt_off0001616e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1616E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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