Malicious PDF — malware analysis report

Static analysis result for SHA-256 368a2472c0b3ad08…

MALICIOUS

PDF

78.1 KB Created: 2021-03-10 11:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f0903516a187a883b72b44386cac067e SHA-1: 9fec1ee4dffc118c01bb51ea0f8c33696cf71cd4 SHA-256: 368a2472c0b3ad08e980625ae1e8f22bedca1d8b150a3d3e4d1ccc7692b09280
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 0.9992

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://dafemum.ru/123?utm_term=picadora+de+pasto+de+corte+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72b38f17c5.pdfIn PDF document text
    • https://wadaxoleda.weebly.com/uploads/1/3/5/3/135311928/1099476.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/vozajofix.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/wutowefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_60339e5ce3acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_6024528b6c391.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/8632428.pdfIn PDF document text
    • https://kudaxemukuwofi.weebly.com/uploads/1/3/4/6/134691428/vukuxewag.pdfIn PDF document text
    • https://donimafu.weebly.com/uploads/1/3/5/3/135395233/4631626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5fd6965835c17.pdfIn PDF document text
    • https://sojurepew.weebly.com/uploads/1/3/5/9/135992925/kujarap-nupuxabe-gopopu-kotir.pdfIn PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/2991256.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/529b7725d9c524a.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/xezonijida/6768475921.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/dremel_4000_kit_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe1b0a1-5af9-41bb-875c-b40b085e7c05/father_and_son_clothing_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/10739713158.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/canon_rebel_t6i_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/88908544464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/692c7748-5406-44cc-afed-f1e1a42026cd/thunder_cake_book_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/mosoduribaxojet.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/pampered_chef_can_opener_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/hd_backgrounds_for_android_phones.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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5220 bytes
SHA-256: 5c030b4d767ea88b134b053fa2fb2a1a25c769c319dde189156e8534d18f39e3
font_01_sfnt_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 12072 bytes
SHA-256: 712103f1dce81b9e323daeca1743b6922d8b0d1d70f1c8720618c1aaab4f4c0c

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