Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df3c29e059ae187…

MALICIOUS

PDF

74.6 KB Created: 2021-03-23 03:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a7f6ed79eeda323c550895f2431740d SHA-1: db411a4b6bb078b69db369bd5b98ea7e6669c608 SHA-256: 4df3c29e059ae1875717d8d0c2feff99fc10d3c6fc9efef63973544a45194645
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=comparing+chloroplasts+and+mitochondria+worksheet+answers
    • http://xupajililudolod.22web.org/mercado_internacional_definicion.pdf
    • https://cdn-cms.f-static.net/uploads/4487432/normal_6048605cb7421.pdf
    • https://static.s123-cdn-static.com/uploads/4448976/normal_5fc6f41c8529b.pdf
    • https://cdn.sqhk.co/mazinatefoso/XcAghic/24330876346.pdf
    • https://cdn.sqhk.co/zoribakim/gePSUx2/80422449312.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ff1e917df2ef.pdf
    • https://static.s123-cdn-static.com/uploads/4416810/normal_5fe4f4dc09270.pdf
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5fe4426eebbae.pdf
    • https://cdn.sqhk.co/xoraxuvonaf/tuOigib/46030023121.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10867560-a4d0-4261-99b3-fb92885255ee/why_does_my_cable_box_say_cast.pdf
    • http://waminakukivexo.rf.gd/semi_formal_dress_code_tie.pdf
    • https://uploads.strikinglycdn.com/files/8071df1b-ec09-478e-808e-8f52e8fde1ed/what_is_the_chemical_name_of_oil_of_vitriol.pdf
    • https://uploads.strikinglycdn.com/files/f360e2ab-583c-4a57-860a-9a5c365a6172/19842742101.pdf
    • https://uploads.strikinglycdn.com/files/d5e79870-280d-4c5d-b9db-caffe01322b3/what_kind_of_battery_does_a_honda_key_use.pdf
    • https://uploads.strikinglycdn.com/files/f0cd93bf-59f0-447e-adce-b7e3a5362440/zenav.pdf
    • http://nomijedelalevi.rf.gd/72603992020.pdf
    • https://uploads.strikinglycdn.com/files/b55ee94f-6cf0-49d1-97e3-838c44473dc1/kibawavabo.pdf
    • http://katiwepu.rf.gd/basic_automotive_parts.pdf
    • https://uploads.strikinglycdn.com/files/f0437f00-f1f7-4fdb-8685-432dac87e247/how_do_i_reset_my_asus_ac1900_router_password.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_off0000e4e8.bin
3efca994e566a11da3815a687d4d6ca4c74079d74179143b5dfd70040750c09c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 5548 bytes
font_01_sfnt_off0000f7a6.bin
0fe2f99f2bc1d51c68eee3434870e7b6cbf89b7802f660d4a1e1804c4e3ddbd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 11000 bytes