Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b45e2297632d82…

MALICIOUS

PDF

69.9 KB Created: 2021-02-24 02:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 010805bc64c9aec9c805b5485dcbf4db SHA-1: 37b2895ee9e23a4fac09aabe061e69b11c816cbd SHA-256: 74b45e2297632d8208547fe8340544d8048c0bd872fd0bdfde4e7784081432da
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection attempt. One of the external URIs, https://baarspo.ru/123?utm_term=the+dark+tower+cast+imdb, is flagged as unknown reputation. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a phishing or malicious content delivery mechanism.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=the+dark+tower+cast+imdb PDF link annotation
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/womedewiwafogos_lorozarabij.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/ZojjHji/57557439908.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/tafogusegabomu/supunowapilatuxobajoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/83854777968.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/a5_desktop_calendar_template.pdfIn PDF document text
    • http://pawekixezad.epizy.com/poxadazolepowif.pdfIn PDF document text
    • http://lowadof.epizy.com/jimekubejid.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/xotunujikofizijuwijasew.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/bpsc_assistant_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/reversible_adiabatic_process.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/ionic_4_login_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/g_shock_rangeman_9400_blackout.pdfIn PDF document text
    • http://wusozugidiwe.rf.gd/book_creator_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/fuwaxomep.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/limited_company_partnership_agreement_template_uk.pdfIn PDF document text
    • http://letupekego.rf.gd/kh2_how_to_stop_anti_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/turnigy_9xr_pro_simulator_usb.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/66961282303.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_off0000d1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E9 5392 bytes
SHA-256: 0aff23c76daa522b3a1e5b62a0303a94f493f6130f3ba0ae81b03fb18495b66e
font_01_sfnt_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 11480 bytes
SHA-256: 722ac03304d3ac01f1ded3eaa2c679984a4049f06525901f24d87ee47283f130

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