Malicious PDF — malware analysis report

Static analysis result for SHA-256 567e9f4ed4f5c2f2…

MALICIOUS

PDF

76.3 KB Created: 2021-03-16 07:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7571d3f6fc2baad929ef0a54a45297c8 SHA-1: 916c1bbacd1b31edb66bef8a9cd20947fef4a0b8 SHA-256: 567e9f4ed4f5c2f28515e9903efb4ee4c65139bbce55c97b6763d0d1ef096349
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'vilenefex.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a compromised site.

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
  • 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://vilenefex.ru/wix?keyword=how+to+load+pictures+on+chromebook
    • http://xafevak.iblogger.org/kufelesuved.pdf
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/vifurujabip_xukis.pdf
    • http://gojuvop.iblogger.org/datujexekepo.pdf
    • http://mkuu.club/23193893688uhfy3.pdf
    • http://cheatyou.site/vurejodolafadusafulaxm7bda.pdf
    • http://ergors.space/gastroscopy_report_samplezz9w2.pdf
    • https://nunibuzobaga.weebly.com/uploads/1/3/0/7/130740367/zakobetofitewibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_fba683af94464777bbbd043a73d0ccb4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e6fff72e-33cc-47a7-87e7-8de68aaba4a3/100_most_common_spanish_words_flashcards.pdf
    • http://nabumib.rf.gd/myers_briggs_test_fictional_characters.pdf
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_6a31f2f38a21415d8c239e0fbafa488c.pdf?index=true
    • http://xuvufajozurez.rf.gd/11262909288.pdf
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_03aadc9c72de4fa68173c83ba39b8053.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4171f857-edc8-4c69-a6bb-9f841d328f61/44594560715.pdf
    • https://uploads.strikinglycdn.com/files/61dccfb9-0ccb-4b68-a2c7-98f33a8e3806/introduction_to_psychology_syllabus_community_college.pdf
    • https://uploads.strikinglycdn.com/files/30902451-3a1f-4102-bca6-99f6eb97a350/boxamasodizagewekidugo.pdf
    • https://uploads.strikinglycdn.com/files/beecee7d-7477-41aa-95a8-c6c01fc9e790/how_do_you_test_a_pressure_transducer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec76.bin
c1098516d9a9c17495a6f3173f947318a5571c606662d43e2e1071e157b71e42
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 5572 bytes
font_01_sfnt_off0000ff42.bin
c55653bccb4310a43c71702ab9758d5b27f627a0906ba3e8a05c06de3e5385e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 10784 bytes