Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31e414dac1fec13…

MALICIOUS

PDF

200.3 KB Created: 2020-12-19 02:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 732a616ab213e897556778ffbdf07594 SHA-1: 79448deb64721d02efd8e0c223806a1211d4e895 SHA-256: c31e414dac1fec1334a4d5027d6664a3aa71b7704a859e4ea3147be2b804404f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is `https://traffset.ru/aws?utm_term=how+are+oceanic+plates+formed`. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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://traffset.ru/aws?utm_term=how+are+oceanic+plates+formed PDF link annotation
    • https://matebafezit.weebly.com/uploads/1/3/4/5/134592398/mofubija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fc23edb641ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5fd6c7850b399.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/3417d4a5b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_5fa081a085c8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1701a3dfdd95b60d8e131/t/5fc96fc5ed280e32aa83ffac/1607036870538/velazefaberafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65515b34-f71c-41e4-950b-f61ca95b2ee4/biology_keystone_review_packet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46e378d-0713-4702-b835-1bb8a2e41610/84984303468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458c4617-868e-4254-9303-1c8808eda1d0/migetarajewijawosunijidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77914fdd-ab81-4ce4-8024-e95a90bcd638/ritolilomiturefe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002bc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC20 5356 bytes
SHA-256: 5a98ae10f6de86f40454a8a2ab1120f19bd9e3aff70f8d4d375b8ed6287e111f
font_01_sfnt_off0002ce4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE4D 15020 bytes
SHA-256: 7bf8428123b411933657e79c5cba5b33b7cf5077943d9b27334a86083b579a9d
font_02_sfnt_off0002fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9E 16088 bytes
SHA-256: b2ddecaff7e2361bf51021b35f9c014659943b600c4f466cb4656cea9e83b80e