Malicious PDF — malware analysis report

Static analysis result for SHA-256 855813f97fce0ed8…

MALICIOUS

PDF

68.3 KB Created: 2020-11-26 23:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: dca8963aab59566252f7354bc1fa9f75 SHA-1: 15d9b9b8ff9cb9ccf6faceedaffa50e4ed981acc SHA-256: 855813f97fce0ed826b8953a81d2f5b99ccfd1476e5cb3532f4265b0f98473ca
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to deceive the user into clicking the link, likely for phishing or malware delivery. ClamAV detection further confirms its malicious nature.

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffmen.ru/123?utm_term=basic+background+check+form In PDF document text
    • https://lonerunit.weebly.com/uploads/1/3/4/0/134017922/bawimepabavixuwomid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f89f1191085f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_5faa79c3b2c74.pdfIn PDF document text
    • https://jowuxedajaris.weebly.com/uploads/1/3/4/7/134716551/2149078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_5f938e796de96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fb7a6cb3eccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5fb2598261964.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/jeromopelurab/ak_47_wood_furniture_stock.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/18744329387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37dabc0a-4ad4-4715-ad4f-bf7f923d7dea/2018_hyundai_santa_fe_sport_ultimate_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gajejasa/onenote_app_annotate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbbc9b6-ff88-4696-bf98-6ade9cbe89bc/puletojijidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f1913d-fdea-48d4-831b-855dbfe5abc2/rowuv.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/casabianca_poem_question_answers_class_7.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/nujarob.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_off0000cf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 5656 bytes
SHA-256: 4030ec11618f4bcf5f30bb01383b0bc79b5f11f97d2ce135abb1bc7659d027b8
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 10060 bytes
SHA-256: 7466568e13c75836a988ec48829fbd25d62cdf46d87ecac079b0b77e2b45e015

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