Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f0596dd72ceb99…

MALICIOUS

PDF

74.2 KB Created: 2021-03-19 09:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f34f64d8e80d89a55c80cddbca6991a9 SHA-1: be5e736ac36c61c6613f66aa379c2dc824ae431f SHA-256: 62f0596dd72ceb99a456bef43047e892bdbe5e0998e5d85c37b018e4d41b0442
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Port of Rochester weather', suggesting a phishing or scam attempt.

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
  • 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://yafferge.ru/wix?keyword=port+of+rochester+weather In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_601b7c9db6db8.pdfIn PDF document text
    • http://xexajume.iblogger.org/sejarah_berdirinya_dinasti_abbasiyah.pdfIn PDF document text
    • http://foxeged.22web.org/zarosinosogevawapem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5fffb069859ec.pdfIn PDF document text
    • http://sozisogu.iblogger.org/understanding_symbolic_logic_klenk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_601be6f5f36cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471985/normal_603a56ef88321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5fd8fc9633007.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410416/normal_5fc8c1a10cedd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426423/normal_60119fe4edee3.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/30197464863.pdfIn PDF document text
    • http://dabosesavedevet.medianewsonline.com/arena_simulation_software_tutorial.pdfIn PDF document text
    • http://fuvepupur.22web.org/the_lottery_summary.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/50418e98-1d7e-4a1a-baf1-39945da3adb3/confessions_of_a_shopaholic_full_movie_watch_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4048bf-3350-4f78-8b70-1607382185ca/fupalopoxadivovefobuxetuz.pdfIn PDF document text
    • http://bazimiguzanuv.rf.gd/77420802906.pdfIn PDF document text
    • http://sabinozugi.epizy.com/sejefagagepaxesiwugutezav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ea69b0-d292-481a-a26a-fb52ce02c98c/landmann_smoky_mountain_electric_smoker_manual.pdfIn PDF document text
    • http://bexinoj.epizy.com/kagozupeja.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_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 5028 bytes
SHA-256: 64cb3a902d3c85062167b5d0c4c1b5fa5f81b75389ee9d4d2fbf978a293d5fff
font_01_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 11036 bytes
SHA-256: 79e5b51e2e8dc9c6946a2eb2264a9763a04285619d051254008b77bc76ec8bc1

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