Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca9774f6e5ec3cd…

MALICIOUS

PDF

76.7 KB Created: 2021-02-24 12:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 32ad0e9396a7ebb408d960646e79d42d SHA-1: b1599b30eacf6c11df245edbca2cdc1bc5eec53d SHA-256: aca9774f6e5ec3cd9e92863d91dc4a18a101dbd16ed98ee559a74d4ceb2afe77
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely designed to redirect users to malicious websites or download further malware. The presence of embedded URLs further supports this attack pattern. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=public+relations+manager+skills+required PDF link annotation
    • https://cdn.sqhk.co/xataruzepape/Sgg1hgW/xonikalixajeb.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/Ocjhicd/pozokepimetujatomef.pdfIn PDF document text
    • http://deluwotitawugo.iblogger.org/el_viaje_de_su_vida_summary_chapter_4.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/gewepafomulesu.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/B5jdRfZ/lasiti.pdfIn PDF document text
    • http://bluebadge-support.com/agentes_y_apoderados_aduanalesgnvhm.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/ehbZyNq/72650295577.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/ifgiHgj/41800805973.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/3083647.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/cjehdJd/nbc_sports_boston_celtics_podcast.pdfIn PDF document text
    • https://xalekosud.weebly.com/uploads/1/3/5/3/135350534/gamexem-fekapo-widuwafawoja-zobabodovip.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/cJcigJE/70898368561.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/gJvij9j/ap_village_president_election_date_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/taxosavasesa/dhiahch/vuxunopade.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/aiiw9gf/47614115132.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/iIhchA9/xaxex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwutaje.epizy.com/musival.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_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 5588 bytes
SHA-256: 50b55f9e4d2f4750a36e0b2766973ea83b001a8367f53e0f970eaae1fe2f062c
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 10080 bytes
SHA-256: b2ac1f6453caa6a6d9bd3d794bed5225495c4f52fb65b7310ac7b338c2f3edfa

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