Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3ffa4b9371ace9…

MALICIOUS

PDF

71.2 KB Created: 2020-12-26 08:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c34dbc34d149e0f7e6b3d29eb4a8d414 SHA-1: 22e468c5fd70e4b4635b4d767e10d5daab3c44c7 SHA-256: 2c3ffa4b9371ace942a32fe1c8a5e0e48951844162118ae5e7a5b028a486b32c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to contain text related to a recipe, which is a common lure for phishing attacks. The presence of external URIs and the ML classifier's high confidence score further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=sour+cream+pound+cake+recipe+allrecipes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371799/normal_5fe01d33d6b2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5fc65e06ed324.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ijUiiji/pijowewedut.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/legipalofi/iron_deficiency_anemia_in_pregnancy_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/24936257845.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/gezevakam.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/3d_maker_for_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05cf2087-30df-48c5-a664-e9c61cc1efb7/the_shadows_jr_ward_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/sajaraditibafodidonekafom.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/manual_for_ge_self_cleaning_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/finadis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18024a3-d069-40cd-8950-6535198bd4a4/signs_of_chihuahua_going_into_labor.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_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 5384 bytes
SHA-256: d9ef8994c24acfd2bb53dced8780eb0b9e20cdb5471d4d62d700cf21f787e14e
font_01_sfnt_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 10716 bytes
SHA-256: 538848eda5408d401573537c824cebd6b17942ce6d4df57dd29cd9613e831835