Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8dcbff463ec9efa…

MALICIOUS

PDF

70.1 KB Created: 2020-12-17 06:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f2413b2aa224c66990763e2f105213fa SHA-1: 11a86fc5c41498c0f48a293c3700d7ff8071e76d SHA-256: f8dcbff463ec9efa10edb0e1578b29986847699950baa3853c6f93ea6adc8280
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 0.9997

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://traffking.ru/123?utm_term=jack+black+son+name PDF link annotation
    • https://bexitapanirid.weebly.com/uploads/1/3/0/9/130969950/2534520.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/xajelubajole.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/pedubipiva.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/c68b2e8f2.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://static1.squarespace.com/static/5fc5af5f12facd59cecdbb78/t/5fd10c1adae93b303af91841/1607535644664/cabify_es_legal_en_colombia_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6041b1-a47f-46ac-bb13-ff7ed8c80dc3/dishonored_safe_combinations_steam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d45c6609fd0ee7aaa180/t/5fcdf8e5e43f2b00a8cd3851/1607334122015/new_english_songs_2019_list_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5b5540-c939-4f44-a9c5-31215eb81576/nasosebox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28998403f5353fda0357a/t/5fc57f2518e72e5fdb933a38/1606778662816/35582074491.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc18c6c18e72e5fdb1292d3/1606519917633/kejisidazekutibusadav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77a4610d6a92a736c4974/t/5fcd5f93f94b6402b22c148f/1607294870542/bubomefiz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 4700 bytes
SHA-256: 788bca7dddb9cc073d98e2d8cd2b9493d1248f2e0405dfbaef7ef11ca76afc2a
font_01_sfnt_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 10384 bytes
SHA-256: 4cf27b24b5c05d058c8c9c6ab7d11aa1aeabc25d6121ca590d545a3bc1f4c2a4
font_02_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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