Malicious PDF — malware analysis report

Static analysis result for SHA-256 527865e3e26035ec…

MALICIOUS

PDF

66.5 KB Created: 2020-11-25 10:48:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c63acdcecbc819e5426673fffe656c34 SHA-1: 21ac319a5d1e84cfbfe87e499463f7074632ed1c SHA-256: 527865e3e26035ec2e188856fce5a9c3709a748d355bf56ead9c2eb697369163
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely for further exploitation. The document body, though heavily obfuscated, appears to be related to scientific information, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=ionic+radius+of+fluorine+ion PDF link annotation
    • https://migamusuzugu.weebly.com/uploads/1/3/4/6/134657386/9973750.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/timozuralisawe_ruferu_vurodositex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f1716b-a1c1-436e-8949-07cfa1e6e187/delebodejegavad.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/18989646884.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/dujurokitisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e46c6a-8f0d-44e1-8465-8ce80e38a1be/teyana_taylor_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/noradifejamoliv.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/hellenistic_astrology_course.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/dilosawowozokusawu.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/cisco_anyconnect_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/anlage_v_2018_ausfllbar.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_off0000c71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71E 4952 bytes
SHA-256: 9677c759b487302146c61ca3a013181c5c1412494caccf8011fdff779105d1f6
font_01_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 11132 bytes
SHA-256: a9c8b2aa7b9aeb58ca51c14d036fe337cf8ab5c568dccdb5f4a67773cdf8b9e9