Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebbd4cd5f3994fa…

MALICIOUS

PDF

69.0 KB Created: 2020-12-30 23:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c10d8f7975e28e74e0c7d1820a5a749a SHA-1: ec94c888e00ee3e992005a722a96e82d82868d03 SHA-256: 2ebbd4cd5f3994facbfe75bb72a4744045c3bf778d1df86e5fe30f391af3aaf9
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, characteristic of a link farm or SEO spam. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=cuyahoga+heights+high+school PDF link annotation
    • https://cdn.sqhk.co/jakufomego/d0ki5ia/besuwosaxitokurapokosirod.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/02d9eb7ed.pdfIn PDF document text
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/xosisesugefa.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/fupanabivote/bobut.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/57493421779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0291a1b1-ea86-4563-bfec-76580067cde0/smoothie_recipes_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdf4a49-ee18-4cbf-ac00-0bb90ebbe3a3/wogovemusurakovuridirabi.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/52376411567.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/tinkle_magazine_free.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/challenge_bengali_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d54dc29-3e82-45ef-952a-ae8824b49279/tazatevuxopavuduzavexub.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_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 4972 bytes
SHA-256: bd7c24fa7fef1a3bda38d2aee2f1fe925ecfb59e9c553aa378f832bab484722c
font_01_sfnt_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 11564 bytes
SHA-256: 42023e93850e84b8bb994cf75cc6bbea7d5dc84ebb03edbcfd9d3bd9bdc9b8db

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