Malicious PDF — malware analysis report

Static analysis result for SHA-256 375a96c6c46ed69f…

MALICIOUS

PDF

75.0 KB Created: 2021-06-01 11:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2f10b47a50a3e99f5f12af7dc506056 SHA-1: 541bebf7ef2a5c4ec6f741cc86fd7f50b90f8d97 SHA-256: 375a96c6c46ed69fa3eb3e5efa27b386b7c1a7945985933ca6cb966025c2d624
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 embedded URL points to a domain associated with downloading software, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing attempt to trick users into downloading a payload.

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://catamma.ru/pbw?utm_term=como+descargar+gta+san+andreas+para+android+lite
    • https://cdn-cms.f-static.net/uploads/4499629/normal_604ff225e4793.pdf
    • https://static.s123-cdn-static.com/uploads/4497095/normal_5fc8610bf06fe.pdf
    • https://cdn-cms.f-static.net/uploads/4499633/normal_6030e91d3d521.pdf
    • https://cdn-cms.f-static.net/uploads/4426557/normal_604da8f0aec67.pdf
    • https://cdn-cms.f-static.net/uploads/4446511/normal_6013bcc69fdb0.pdf
    • https://cdn-cms.f-static.net/uploads/4403688/normal_6036b74391ee7.pdf
    • https://static.s123-cdn-static-d.com/uploads/4418192/normal_60b5e52f1c9f8.pdf
    • https://static.s123-cdn-static.com/uploads/4367665/normal_6007691bda5ae.pdf
    • https://cdn-cms.f-static.net/uploads/4483854/normal_602f6a03c04f9.pdf
    • https://cdn-cms.f-static.net/uploads/4405414/normal_606e242700b91.pdf
    • https://cdn-cms.f-static.net/uploads/4476302/normal_6040042c9916e.pdf
    • https://cdn-cms.f-static.net/uploads/4450517/normal_5fdb05de6acf4.pdf
    • https://cdn-cms.f-static.net/uploads/4454966/normal_604d6b96ca56c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://niluputevi.pbworks.com/f/canoscan_lide_25_twain_driver_windows_7_64_bit.pdf
    • http://wefolevemud.pbworks.com/w/file/fetch/144442830/printable_grid_paper_a4.pdf
    • https://uploads.strikinglycdn.com/files/4adc62ae-458e-44e6-b3c0-054d75c98387/88773691345.pdf
    • http://noxixap.pbworks.com/w/file/fetch/144426420/833167766.pdf
    • https://uploads.strikinglycdn.com/files/88fcc310-7964-447b-ab3c-407739b97f60/59730698786.pdf
    • https://uploads.strikinglycdn.com/files/1b2ac6d8-8ac5-41ca-bb69-6ee26b294dbb/pigaxigabudiviko.pdf
    • http://taxexuwej.pbworks.com/f/jawojumadorudabozowix.pdf
    • http://gatasulupu.pbworks.com/f/20995163057.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_off0000e442.bin
6b84eecd56226e554691d1faa68420c3de46a0b7c3fe2af8ac710adb2602db7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 5300 bytes
font_01_sfnt_off0000f62a.bin
b507a0d61f4183081073076c90b744e3c149093ca3f80763b917a9ce9d73fc86
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 11820 bytes