Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ba9103886bff34…

MALICIOUS

PDF

112.7 KB Created: 2021-04-27 22:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a22f7a7173fce8e8f9313dc25eb8e5c5 SHA-1: 74b0b256bbfe0b4a8de3e49a3401116b2a71c9a0 SHA-256: 94ba9103886bff34aa08fe9b5da42d86d87ff650ae928f1efa192b81e5b0b4bd
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to contain product-related text, likely a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/strik?utm_term=soundlogic+wireless+bluetooth+tower+speaker In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0efcfbca46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_602f6273d581c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_602296f9a6272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_601b363110cd8.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/bunavobenenexub.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/beyonders_seeds_of_rebellion_download.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/dizuposufazuzanujep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371508/normal_605f93c1c835c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fdd65e36c5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_6017a3f3ce869.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/89014987594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60616362de2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_603f5e17c7919.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/81057351503.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/dikobepibelun/kelorumibovapijuleluka.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/how_to_install_the_gimp_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/detinijetetolezizo.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/xonulatisumagege.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/how_to_clean_your_hot_tub_jets.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/tigir.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/how_to_know_if_it_is_a_pimple_or_herpes.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/how_to_determine_rebar_size_and_spacing.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000164fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164FC 5736 bytes
SHA-256: 2c6998da7e238219a13013faf7735002acb83013d670c308651b2d35363cc62e
font_01_sfnt_off00017884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17884 11484 bytes
SHA-256: fcd30af9693d4c35fc6a872e8067f9a0efd6138c13553357ccd62d29a0ae8a07
font_02_sfnt_off00019fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FA9 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953