Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a573e12c448044…

MALICIOUS

PDF

71.4 KB Created: 2021-01-08 17:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ce5f6e45bfd6536a6c1864a3f64f724c SHA-1: 797bcad028b683e37e65fd3beebf859703515eb4 SHA-256: 47a573e12c448044702ce20a1e52d5b14e79a69a7b8363d3e80fe36ea0c51b88
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure suggests it's designed to appear as a service manual to entice users to click the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=bashan+250+service+manual+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5ff515bba6f70.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/Vghjhux/vivozefufanenem.pdfIn PDF document text
    • https://poxokisajape.weebly.com/uploads/1/3/4/5/134592502/2444489.pdfIn PDF document text
    • https://zotolujirerezo.weebly.com/uploads/1/3/4/5/134582396/zugufe_gakimuduzane.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/tumasun/burlington_ma_property_database.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe700274-c1bc-4d74-a478-7829b82a8134/download_soccer_heroes_mod_apk_revdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b4c87d-0654-4053-989a-927bf12411c8/99589288395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f645b97b-b67b-4604-9b7c-d281ab1ca931/87436865626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8eea47-4935-4528-83e5-471626b5134c/dotemepesenuladonisinidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72caaea9-0957-41a9-ab34-fda85dced469/gopro_5_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7336f06-f740-48c2-8625-7567f7b71685/encuestas_a_los_empleados_de_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1100d5-f885-4f44-af7b-f43d4b32c6cc/29286419735.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_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 5904 bytes
SHA-256: e9a69ce3fc9ce58af1417923be01215287b2fc96f6dc35eb300c9b34baff0162
font_01_sfnt_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10916 bytes
SHA-256: 2041a43c4c7a7e0e3ec5d591745457f083e4554281bc273f6e9061beee84188f

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