Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab92b1000132001…

MALICIOUS

PDF

102.4 KB Created: 2021-03-13 15:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d9c97ee32b1d19a7b4608ff2557e1de SHA-1: 72b6889878c263799b9acec8203feb35b8b54e4a SHA-256: bab92b1000132001d7eda40fa50abb40c9244c6fc6f5cf12776ffa8445284ead
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://soxebez.ru/award?keyword=anormalidad+psicologia+pdf', is directly associated with the PDF's content and is flagged as unknown reputation. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', strongly indicating malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/award?keyword=anormalidad+psicologia+pdf
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/tumuzezujusutuguju.pdf
    • https://pevidutapare.weebly.com/uploads/1/3/0/7/130740538/xenuziwuxabafiki.pdf
    • https://dixitelenamipum.weebly.com/uploads/1/3/4/3/134380202/gexawemuz.pdf
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/dbd0a72a451f877.pdf
    • https://bonikelebosobi.weebly.com/uploads/1/3/2/8/132814552/jakolutunamem-mujuruxuz-timanodat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_90b19c072ed5400da80b98426490a930.pdf?index=true
    • http://kesopepi.rf.gd/wavatawezekakupo.pdf
    • https://0c1adbbe-b65a-4c28-9da2-87cea21e0636.filesusr.com/ugd/496951_898d526c06eb42cba9a8e780191cef70.pdf?index=true
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_af264a11d7f949ec9870faf11149a9c3.pdf?index=true
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_91ac16ee7cb24a659a89265f93703155.pdf?index=true
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_cb9ef5cc6f2a4828962140198eaab619.pdf?index=true
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_1857004a853647d98da6941d92374c4f.pdf?index=true
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_fd59399412a941a1bfac4ac5bb9ca92e.pdf?index=true
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_db7cd0b241274677aa8508ee91afa527.pdf?index=true
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_9bccc971bd3a45bca987015e080400db.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cc410b2d-3c41-4e24-8283-0ed457db2699/can_i_use_roku_to_stream_xfinity.pdf
    • https://uploads.strikinglycdn.com/files/a516b5eb-4454-4ca5-8e8f-5aa6fa99ad88/what_is_ppt_round_in_interview.pdf
    • http://sutuvufekejute.epizy.com/different_types_of_wiring_system_ppt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014359.bin
1254b8250294455169ffd2b0815fc952a1f3c89ffc89655c767b42586c81837a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14359 5056 bytes
font_01_sfnt_off0001545c.bin
3aade4a4d2949632577697ba83a9b893fc26746e5d02f962a973f764e2edd5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1545C 12432 bytes
font_02_sfnt_off00017cdf.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CDF 4324 bytes

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