Malicious PDF — malware analysis report

Static analysis result for SHA-256 32449baf0e181b6a…

MALICIOUS

PDF

69.0 KB Created: 2021-03-03 18:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03bdaa87cfa86791fd5c97c68ed982f1 SHA-1: f5e8dd10eef52824b17119e8548283615bf50c2f SHA-256: 32449baf0e181b6ac532c6bebcb2f37c80dde530a08f96add89fb166d2f499cf
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm. One of the primary links, 'https://crophysi.ru/wb?keyword=toro%20power%20clear%20721%20e%20oil%20type', is flagged as a malicious redirector. The ML classifier and ClamAV also strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=toro%20power%20clear%20721%20e%20oil%20type In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5fef616c63e9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_601b198c022e6.pdfIn PDF document text
    • http://chuvashovfamily.ru/setasolifamomonogekesila9ykga.pdfIn PDF document text
    • https://sutiwipuxepol.weebly.com/uploads/1/3/4/5/134517417/jidufan.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/xifalikiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393506/normal_5ff03f369e9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_602c414e6eb0a.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/8136638.pdfIn PDF document text
    • http://meinekarten.best/quien_anda_ahi_john_w_campbellvji55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_600134e9295f0.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/75f6f951198c4b0.pdfIn PDF document text
    • http://evatopshop.xyz/46943235289enm0i.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/3538932.pdfIn PDF document text
    • http://biweekamnf.com/midnight_in_the_garden_of_good_and_evil_chapter_7_summary1fk53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kofabube/87200402147.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/bhoot_fm_2_november_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/drudge_report_whistleblower_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/anker_powerport_solar_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/xarawizorununegoketovex.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/71647185062.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 5156 bytes
SHA-256: 885d1358e6f8aceb70e4389250990a97949727450621e796ec416ea3231f53db
font_01_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 10504 bytes
SHA-256: b10726a8c39af8eddf6c78bc31d3f02480d726f43ddb9badf737829e9a20de2f

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