Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300e6b0b3d9b117…

MALICIOUS

PDF

70.8 KB Created: 2021-02-14 05:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d600b3ba226d92a590041356d6b74424 SHA-1: 260829b681f1eae155d270e4c23c9af2ebae7971 SHA-256: e300e6b0b3d9b117328d529023718ccdfaffe19792c6acafe7e7d2890b2f5658
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with critical heuristics indicating it links to known malicious redirector infrastructure and a large external PDF link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/wix?keyword=the+echo+manual+4th+pdf In PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/wolidile-xikuzemuno.pdfIn PDF document text
    • http://madewithsunshine.com/rugivejz1rlu.pdfIn PDF document text
    • http://nuverlites.online/62817167895g0okz.pdfIn PDF document text
    • https://vegekevovixo.weebly.com/uploads/1/3/1/4/131437475/bepitepafibolojuve.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/zusevamasor/physics_textbook_grade_11_nelson.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/nedofasotowinodanipul.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/kaxoxuko.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/conjunctions_exercises_for_class_8_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/63255750944.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/kawotekufofu.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/materi_tentang_amdal.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/paraphrase_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/fannie_mae_guidelines_regarding_large_deposits.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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 5156 bytes
SHA-256: 24ceaa6b978e71ad9ffb373d8a570e9b75f6415d8fbf463b3f4964df36c81a1b
font_01_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 10032 bytes
SHA-256: e0ec053b053d228b2067482f3c3ec603eceee826c6a5704b607a59a7dcf9d7f6

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