Malicious PDF — malware analysis report

Static analysis result for SHA-256 008a5d90ca9c7317…

MALICIOUS

PDF

64.9 KB Created: 2020-12-27 18:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c01a9ceb93b16b12b24224f86b22207c SHA-1: 5cddcec20ca4b25b3001d27d9f1429668e15b98d SHA-256: 008a5d90ca9c7317067ef49902a16480a4c7142de67ee2a7c8cfdccc6a73e8fd
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The heuristic firings suggest this PDF is part of a link farm and is designed to lure users with seemingly innocuous content like instructions, while actually serving as a password-protected archive lure. The ML classifier strongly flags this as malicious, and ClamAV also detects it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffking.ru/strik?utm_term=slot+car+track+set+hot+wheels+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f91065735b34.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/CJEeSgf/cloudflare_log_fields.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/3749954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403534/normal_5fcd3108620df.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/gjjhggi/police_car_driving_simulator_apkpure.pdfIn PDF document text
    • https://setixifofu.weebly.com/uploads/1/3/1/6/131606861/joweguxozimu_ponubuf.pdfIn PDF document text
    • https://nujolekilerimiv.weebly.com/uploads/1/3/4/5/134501562/gujavitujura.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/iBmhjEP/our_solar_system_is_a_collection_of.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/zetare/18936710835.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/instagram_post_template_png.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/basic_house_rental_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/32282107205.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/82433347085.pdfIn PDF document text
    • https://fccid.io/OTM-8316119-24GTX/User-Manual/User-Manual-4298972.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_off0000c0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AE 5148 bytes
SHA-256: e24cdfd5edc818a8b9807bbfe819b97e49cc344678372a95b4b7b382fdd959fe
font_01_sfnt_off0000d23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23D 10688 bytes
SHA-256: ec0f553870093b9ca637b147eb0c9bfc9db90dba817de5c071a5a3a9d60e64a0

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