Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93525dfec58aa3a…

MALICIOUS

PDF

77.1 KB Created: 2021-02-20 23:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9838d26521ff52443f3a9f9a0788dd9a SHA-1: d6426054137d4df20e5f30e244d1bbe81e18a869 SHA-256: d93525dfec58aa3aca091fc8c1f161f835426a41c6f256d3e5745f4096877aaf
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to appliance maintenance, likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+manually+drain+an+amana+washer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456398/normal_5ff89a04d8a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5fd1c08cabf00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_6016b34c60d14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5fed8f0eae450.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/tixedujegibex/87019658906.pdfIn PDF document text
    • http://bibuligo.epizy.com/25616316220.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/42413568173.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/zuzitijenikagidigotufir.pdfIn PDF document text
    • http://zunaxixe.rf.gd/82348844073.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/rowisujisadifene.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/internship_report_on_school.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bumblebee_car_transformers_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/73665378274.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/article_of_association_template.pdfIn PDF document text
    • http://mijuguxugatuk.epizy.com/1085660365.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/2430866574.pdfIn PDF document text
    • http://xumidexasij.epizy.com/algebra_and_trigonometry_structure_and_method_book_2_houghton_mifflin.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_off0000f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 5220 bytes
SHA-256: 1250835b6a1f371309181670a7517d33592222a190fef192e58d2bf1cacc4dbf
font_01_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 10648 bytes
SHA-256: b8689ed80925a0f958ed155e6ce5c31bc6d1659d780cdcda77fb3f84d4a7212e

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