Malicious PDF — malware analysis report

Static analysis result for SHA-256 03291ee02e9934ae…

MALICIOUS

PDF

73.3 KB Created: 2021-01-14 06:00:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 578c1d1229d182a500f18f6c79c64c3a SHA-1: b21519d81eb7f6bd61a7b1888cb8a882bd4e7cee SHA-256: 03291ee02e9934aefdbba0789dece46f217d73b085525aa2f12dea082c87c29c
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments that appear to be lures. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users to potentially harmful sites.

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
  • 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 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://traffking.ru/123?utm_term=5+prime+end+of+dna In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_5faec33f8bf0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424982/normal_5ff380bd90ce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8b1951b40a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5fa92518a7d5d.pdfIn PDF document text
    • https://wibujiwegawej.weebly.com/uploads/1/3/4/8/134899761/gopali.pdfIn PDF document text
    • https://site-1083678.mozfiles.com/files/1083678/35759462209.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/8d959c.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/a8a33.pdfIn PDF document text
    • https://site-1192597.mozfiles.com/files/1192597/battery_powered_lights_with_timer.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/pofumapetat/1965507421.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/83968079031.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/13170979300.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_off0000d46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46B 4712 bytes
SHA-256: 24ac209df5f83f12aadc7ceb2126ff30f644405ee1c33426426a1482cdb1c5ae
font_01_sfnt_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 11216 bytes
SHA-256: ae0535558a41d151f485b92949a36e652f2483d007c8df50b6c1197d27b5f856
font_02_sfnt_off00010aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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