Malicious PDF — malware analysis report

Static analysis result for SHA-256 0239e6d9beedd21a…

MALICIOUS

PDF

88.3 KB Created: 2021-01-16 10:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d15d882805d31af434564616ba3a1ce SHA-1: 35a3863b01caf066089e97fbe4753b29ee9f8046 SHA-256: 0239e6d9beedd21ae07728826870db861d5cb4123aed2c6646a5fdad49d17c83
186 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 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/aws?utm_term=formoterol+fumarate+and+budesonide+inhalation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411683/normal_5fdff80192a37.pdfIn PDF document text
    • https://ketizinuxemuwiw.weebly.com/uploads/1/3/0/9/130969628/tonawebejepopuk-pojid.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/ojeKGAQ/40956496257.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/d036d17d.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/873754.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/jcjeHTH/pogo_shiny_galarian_zigzagoon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450044/normal_5ffe58f49133d.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/gde6Wgd/18950185204.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/8icO3Cl/21443980858.pdfIn PDF document text
    • https://rupebadik.weebly.com/uploads/1/3/4/4/134465272/wozuramutu_dopowo.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/1962416.pdfIn PDF document text
    • https://burabusuzu.weebly.com/uploads/1/3/4/6/134649623/2811518.pdfIn PDF document text
    • https://zuwuwuxi.weebly.com/uploads/1/3/4/8/134883554/60ee23df3.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/3775824.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
    • https://s3.amazonaws.com/fadedosi/pexuvunopelafum.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/english_cartoon_film_free.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_off00011097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11097 5124 bytes
SHA-256: a862f808a28902bc61581fa8dc27751ba40fed54a85acada0b6a35debcabb536
font_01_sfnt_off000121c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C6 10472 bytes
SHA-256: 9785bcfd4e55e376d2c13e8e2b663f2caec94d898a329e856ed9006c9e57613d
font_02_sfnt_off00014556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14556 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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