Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbb30b5d6284cd5…

MALICIOUS

PDF

75.4 KB Created: 2021-02-21 08:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 304e70b671dfc40820ac3197200fc0a7 SHA-1: a91c8ae1d45b08781cbcab43c7af2bb491080f2a SHA-256: ecbb30b5d6284cd55c101488145a0693c8b99c6e19b0c08918dfdf8b6d84fbda
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to lead the user to malicious content, likely for credential harvesting or further payload delivery.

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
  • 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.
  • 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/strik?utm_term=rostros+para+dibujar+faciles+paso+a+paso In PDF document text
    • https://cdn.sqhk.co/dugelabomaw/gihhjia/colossal_cave_adventure_550_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/cIgdji4/ikea_hours_today_winnipeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/Nib1gfN/playstation_5_price_gamestop.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/IBQgiic/tukijitoweludegaf.pdfIn PDF document text
    • https://cdn.sqhk.co/forexidof/fhjaiiK/4328439087.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/hhgx7xu/36850290924.pdfIn PDF document text
    • http://donimiradibekel.22web.org/15592160212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vazisi/ximusularoz.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/lenepugamuzugidafufizepux.pdfIn PDF document text
    • http://simavanexija.rf.gd/kugifenezelejazudito.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/29702538624.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/jepejewadajar.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/gikodex.pdfIn PDF document text
    • http://gizimup.epizy.com/98878701539.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/tivimupuferevij.pdfIn PDF document text
    • http://vozerurivuboki.epizy.com/gre_subject_test_cost_india.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 5148 bytes
SHA-256: 87b0fc5aae1073da83584f459d393f6db502cb16283a4898620da5619e8979f4
font_01_sfnt_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 10464 bytes
SHA-256: a18467b20966dff768e09d26e58191b26cd164c5dcbc431f2aaf93ba9d593b5d
font_02_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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