Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc21591e23ac1f6…

MALICIOUS

PDF

77.0 KB Created: 2020-12-27 08:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bc0c396fb30a7a73fcbecb95f0668f4f SHA-1: 95d715c0a4f3f6db98c8e4cee1368b6b1afee71e SHA-256: ebc21591e23ac1f62bc702a2fed6672f26728472176ee67eacce057b1a6fb1ea
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 an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=asmaul+husna+dan+artinya+ukuran+besar In PDF document text
    • https://raragunaxunu.weebly.com/uploads/1/3/4/8/134886293/4d0b91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5fc79de26ca92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5fbb7532241ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f9c054f6d7c4.pdfIn PDF document text
    • https://pupaxutakigi.weebly.com/uploads/1/3/4/5/134579126/47957b38.pdfIn PDF document text
    • https://bibafekozoret.weebly.com/uploads/1/3/4/4/134441072/romoj.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://uploads.strikinglycdn.com/files/4af86637-a9f4-4e33-a387-30aad06a3ed8/69499834979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386473dc-3876-41bf-a888-aac9e3b6050d/mivilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef586ca6-68c8-42f6-bc99-422c4041010a/16318800664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7abea2-157b-4dd5-9267-ba4c8e8e53e5/4013714744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2912be2-d551-4586-a0d2-6c1c2f23856c/fatigagudotavafutowuvul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c115a72c-2649-4cde-9aaa-d425a1b63b01/dalimewu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7D 5132 bytes
SHA-256: bbd485af47e7f93a44ddc1833cdf56f734cf0c058ce6c349fa44d4615834eb41
font_01_sfnt_off0000e0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 10052 bytes
SHA-256: da61fd4caa746815810184ffd7d03df68d0bc43e309265f20b554bb4f96be1f8
font_02_sfnt_off000102df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DF 16328 bytes
SHA-256: a7491f26202879f3a0e2a82549004aedd3ea0e2adc2d177ecb206f8c8fa0aa17
font_03_sfnt_off000118c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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