Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc177c0030502a90…

MALICIOUS

PDF

62.1 KB Created: 2020-12-08 11:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4b78d9b96326310fa631acca03382f8 SHA-1: df95f139d2983ccd4097c58f95e2ddb39a892d4f SHA-256: fc177c0030502a90684764d145e84c63892d40f44fff04b10e26a05c32fee0a9
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'Roblox scripts pastebin 2020'. The presence of a link farm and a malicious redirector suggests an attempt to lead users to potentially harmful content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=roblox+scripts+pastebin+2020 In PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/mabaxewiw.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/gumupedi.pdfIn PDF document text
    • https://wivujawa.weebly.com/uploads/1/3/4/5/134582083/dametagunimi-dijafuj.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/xewuta.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/kimaxijimumonerebo.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/fokosurutamop_pigixixe_kakoniv_lozejudugolen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f938f011-a8fd-4dd1-900c-9e3220fc9cc2/66147972476.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38dcd0b6b03258f461b74/t/5fc56ac0f3de5e49b51bd590/1606773441729/mitchell_county_georgia_assessor_gis.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/crazy_car_driving_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c45b60-4403-4474-b8aa-ac5660f2a7f3/graphtec_ce5000_60.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc178a7ea4a794d56491e65/t/5fcdda13f94b6402b23c52e8/1607326228277/5232342033.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_off0000bafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFD 5416 bytes
SHA-256: e1eb0435a2a1680205cc0cae64f9ff17e97918e9e459881bd3490a1bb7d73ab9
font_01_sfnt_off0000cd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD79 8944 bytes
SHA-256: cb1b39f91c21bec1c08251d48ef0b1682c90b5ba62f083e5328b9ef9abc551f3

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