Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc4ab065c6aa0f3…

MALICIOUS

PDF

74.3 KB Created: 2020-11-23 17:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ceb2032629427439b66f54e6827b4891 SHA-1: 405aad3e65ac89a0ac0f4e5835a1b6612cd8341c SHA-256: ffc4ab065c6aa0f35c1837e2018dc16d03597472d305504c4cb98495c4ce9ce7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'tanatologia cristiana pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt.

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://traffnew.ru/wb?keyword=tanatologia%20cristiana%20pdf PDF link annotation
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/musufimenid.pdfIn PDF document text
    • https://xoxuluxikodo.weebly.com/uploads/1/3/0/8/130814296/guguka-feleseputaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_5fba4ca482f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fae0b409048a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f931d1251dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fadf2ac17483.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/kikikab.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/fe5f3e59-ea5d-457f-9aaa-119eb885c714/6580752538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06e3970-e2bb-47cc-a1f0-dca39d517314/10883648380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6320aab9-de1a-4665-9cad-b45d39f21f08/vakemozagisufise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e449ada4-50d3-476e-890b-08568789dbc5/47775851682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe50adf6-3390-4cbc-aeda-bb318c3d3a55/fakekoxajof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746d0d54-96ed-42d5-89d2-9e0c727cfed3/youtube_instructions_for_amazon_fire_stick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59320f78-f6ab-48ea-b0e7-8fe33d35c76d/cbt_anxiety_worksheets_for_adults.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5272 bytes
SHA-256: 1ef3a67e861652800869def1afe8f01e52b109f2c7226977100f75ecdb67ea77
font_01_sfnt_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 11392 bytes
SHA-256: 5f7eebc31f048d24d79ff8fd550deb27d6dd9cd2a5b5cdbb65360242dc9c74ff

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