Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc538236d2d6f37a…

MALICIOUS

PDF

81.0 KB Created: 2021-03-10 02:01:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 50989e022092cf0c041da764e10d7c03 SHA-1: 6fc1e6a9cdb34104e54f992eb77db156b9ae053b SHA-256: cc538236d2d6f37af40bcd48c469f5fb752370b7e990eedd424f6d9193b5cb01
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL leading to a site that appears to be a phishing lure for 'The standard insurance login'. The presence of PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=the+standard+insurance+login PDF link annotation
    • https://tubuzitobez.weebly.com/uploads/1/3/4/1/134108618/welumipakoti.pdfIn PDF document text
    • http://dusikazo.mypressonline.com/sifazobatojatapuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_6020f91c3496f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_6014b606c3ca0.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/vasuvix.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/ayatul_kursi_bangla_text.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489838/normal_5fe8401e585b1.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/darazufokored-rakepalojuxox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_6006ecd9772fe.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/8782669.pdfIn PDF document text
    • http://banewotovotewe.iblogger.org/best_argumentative_essay_topics_for_middle_school.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_600fffc51556f.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/81438490348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapufojutujat.atwebpages.com/79686801072.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/tusumifikimuwarunutesi.pdfIn PDF document text
    • http://banugigo.epizy.com/jquery_ajax_form_validation_example_in_php.pdfIn PDF document text
    • http://kopolug.myartsonline.com/how_to_compost_food_waste_at_home.pdfIn PDF document text
    • http://jasigobup.epizy.com/fedizifiroso.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 2864 bytes
SHA-256: d9eb4a6120ea016b30114cb131a3221ed83c26ec4383e7d40e50d43a01dc9751
font_01_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 5152 bytes
SHA-256: 802e1d97ad114d7b62e69f461bc995552eb33829dd2634dd5e86b8f29a3a4da3
font_02_sfnt_off0000fc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5A 10772 bytes
SHA-256: f4cdbe298f3bb5b2156657d78295b0004c041a29f6ecb3be1cf8440aac779f44
font_03_sfnt_off00012164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12164 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

Open this report in the interactive analyzer, or submit your own file for analysis.