Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde033216140e09c…

MALICIOUS

PDF

67.7 KB Created: 2021-02-02 08:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f9affaf62eda9148acc4b53cd3d6d3d3 SHA-1: 159b416806c1e93423e4ec88fe9eeea3b7464a7b SHA-256: cde033216140e09c45de53964ef7f0fc1d57279a288f003b62c30c57c1f19b51
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, with at least one URL (`https://crophysi.ru/123?utm_term=blue+eyed+butcher+lifetime+movie`) being directly associated with the malicious detection. The presence of multiple disposable hosting links suggests a link farm designed to redirect users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://crophysi.ru/123?utm_term=blue+eyed+butcher+lifetime+movie PDF link annotation
    • https://cdn.sqhk.co/momujolo/1R27gcW/tv9_kannada_news_readers_photos.pdfIn PDF document text
    • https://suzazenesegi.weebly.com/uploads/1/3/0/7/130776168/xobova_giboxejetesejuv_lunodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490542/normal_5fe7ac2fdb989.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/aCajegg/mix_latex_paint_with_water.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/6dhid61/95806315035.pdfIn PDF document text
    • http://egosikenclub.com/2ta12o.pdfIn PDF document text
    • https://wiwetiforezopiv.weebly.com/uploads/1/3/2/6/132695432/373806.pdfIn PDF document text
    • https://datotizit.weebly.com/uploads/1/3/4/6/134696706/ae50f6.pdfIn PDF document text
    • http://qwertyujg.xyz/310935253681chp5.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/bikikanafopavu/sha256_certificate_fingerprint_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/science_lab_report_abstract_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/vulidarifojusoga.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC7 5224 bytes
SHA-256: afb229a735b9b44be60ed2bd75b640585a15538b6e61ab1676878c95be0a4234
font_01_sfnt_off0000dd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 10688 bytes
SHA-256: a19615da81a6463ff9eabd83857574b1ea262756f613fd4d6a22b5c3e1e1bc5f

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