Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7907f9060ef305…

MALICIOUS

PDF

77.8 KB Created: 2021-03-22 14:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0cfba2299c2aedc9d132aedf920576d9 SHA-1: 05babd6e7130fdd9fc4785e2b3397ccb71fa4fbf SHA-256: 5c7907f9060ef305e1e2bfefec99441a77a956bac8b2b0d29d11000dfef65308
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a primary link directing to 'dafemum.ru', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'watch movies unblocked weebly', suggesting a lure to a potentially malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://dafemum.ru/wix?keyword=watch+movies+unblocked+weebly In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5ff7a1f40ceb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468836/normal_6001bca9dced7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460457/normal_5fdc026b45708.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/221dd73e5bda4f.pdfIn PDF document text
    • https://mobisikude.weebly.com/uploads/1/3/1/6/131606420/19658572b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_602445ebc196b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fec59d808389.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/lefilujapepa-dabegego-wisivarexado-gojotikenosodaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_602666128b68b.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/fosagobomap/64620677922.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_11832b9f35944969ba75aaa79017cd76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rufonali/rezodugi.pdfIn PDF document text
    • http://xafofeb.epizy.com/slack_app_for_macos.pdfIn PDF document text
    • http://vazojebimuvap.epizy.com/lepitusawufut.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/axxess_aswc-1_install_toyota_tacoma.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/49863676009.pdfIn PDF document text
    • http://mejesikiwabez.epizy.com/dragonball_android_19.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_031d4e72737f49d699d5bdd5b4b85c15.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_e4ca74a5ec334012802d272579d2f6f6.pdf?index=trueIn 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_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 5556 bytes
SHA-256: b8765c5f22cf15b460f514bade762b18fe5ec8d2b974ee9ac8037cae9ef9e797
font_01_sfnt_off000104ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104ED 10908 bytes
SHA-256: 837723d3166611226921a07c2467f43dcea4915e3db956a6b97d870906b75561

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