Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5fdcaf12a7394d7…

MALICIOUS

PDF

83.8 KB Created: 2020-11-20 03:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1adc5425001bfee0ec7c22a288f3bfa2 SHA-1: 7a059eb05b84e1fc7923084ed19a29cd1de36d2d SHA-256: b5fdcaf12a7394d7593b15ba56a33c858a8a4b9f7256a423df34729d0dccceb8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links designed to manipulate search engine results or distribute content, likely leading to malicious payloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffset.ru/aws?utm_term=read+data+from+google+sheets+python PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f89c3cddfdf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f8cc9b99bb92.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/b166203bc99.pdfIn PDF document text
    • https://guxelopadak.weebly.com/uploads/1/3/4/7/134727887/nakami.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/wideverirufopoguko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/ied_study_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd14a780-0d57-4739-acc0-5c8f8de4d3c3/fisamiwuvipejuwalosedevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d9aea3-50f4-4c4c-a480-5c1326ce7881/tolopoxivuduregu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/pitokoxadesimobopig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8105fa-1242-4c60-9a56-87291889b6d4/tafil_1_mg_plm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adbaf54-edf8-417a-99f0-736846931740/7543128700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350fc22a-ebb9-4091-a91a-6effb54c9145/miraken.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5304 bytes
SHA-256: 48635dcd7ed7bcb879d66c14cf5f78e6c2917adf01a0d76cb9c1ae6c007b3347
font_01_sfnt_off00010071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 16848 bytes
SHA-256: d429e4a985be0b615792702cb533e1cb2c6b385fea8987ece0dfd2bd39425398
font_02_sfnt_off00013491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13491 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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