Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69ead0343ba91c2…

MALICIOUS

PDF

75.1 KB Created: 2021-03-27 22:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca923c826c6af11ee6fd6853b7838f10 SHA-1: 5402c7a2e4b61f6688da749dc570a10bbae0df31 SHA-256: c69ead0343ba91c2819e0b235e3a2d58f355f38b098a42274883122f78189d7f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=bulletin+de+salaire+vierge+pdf+assistant+maternelle PDF link annotation
    • https://lowujowe.weebly.com/uploads/1/3/5/3/135320741/sedofozimub.pdfIn PDF document text
    • http://lajulufubugo.22web.org/dizubelumexorotepof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_601039340dc58.pdfIn PDF document text
    • https://tidepobowajaxuk.weebly.com/uploads/1/3/0/8/130814761/a533747de364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_6043852e60b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_601876d3dbe29.pdfIn PDF document text
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/0285b50e8094d2c.pdfIn PDF document text
    • http://faxobasom.22web.org/nezamaliwamibefosuwerokin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedalavupu.epizy.com/donepoju.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/64873130651.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/jivujuzaxifizoxerivoveso.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/52854810247.pdfIn PDF document text
    • http://bimomog.rf.gd/79637713242.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/tiripireta.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/21389024789.pdfIn PDF document text
    • http://tuxavilewik.rf.gd/momit.pdfIn PDF document text
    • http://zemadepa.rf.gd/68021541242.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/mesemakadude.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/pizisupafonakegoxid.pdfIn PDF document text
    • http://potaxupixikubud.rf.gd/uber_business_model_canvas.pdfIn PDF document text
    • http://pusugoli.rf.gd/xemupakifitedazel.pdfIn PDF document text
    • http://sasirirufib.rf.gd/13138476682.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/buwodom.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/ar15_barrel_nut_dimensions.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5472 bytes
SHA-256: 18edc8cf952889016af807fa40258305ffee8be53098b3cead2e4f191a1b612d
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 10980 bytes
SHA-256: fc13b6ca4d3137fdcbb679141c3e9e75c6465728206c5faf720a57ed28d4f72d

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