Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2bb28d11808b1b…

MALICIOUS

PDF

69.8 KB Created: 2021-02-10 18:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cc79e27677e3fa158bbb5d301dc00c55 SHA-1: 2ebdfca6904fb57516301cc9d76d3d828cf6136f SHA-256: 6d2bb28d11808b1b32473d462a104f84f5b6af8578b6014b1dfdcc2c4295a545
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. While no scripts were explicitly extracted, the presence of numerous external links suggests a phishing or SEO poisoning attack pattern. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/aws?utm_term=manual+modem+alcatel+lucent+i-+240w-+a PDF link annotation
    • https://vibakifekapob.weebly.com/uploads/1/3/1/3/131398015/7495867.pdfIn PDF document text
    • https://vipagazowarofi.weebly.com/uploads/1/3/4/6/134685611/joxoxarerijufuk.pdfIn PDF document text
    • https://vigoruso.weebly.com/uploads/1/3/4/1/134131386/8e190c6eb.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/6084716.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/vowexevob-mikilat.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/kowuxa.pdfIn PDF document text
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/mijiv.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/momubutedu.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/sabevobusumibala.pdfIn PDF document text
    • https://vepoxiwoja.weebly.com/uploads/1/3/1/1/131164136/4292754.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/limepusotanal/dezuxiwosagafobeloso.pdfIn PDF document text
    • http://pumusejori.epizy.com/72337184456.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/tafigule.pdfIn PDF document text
    • http://temekem.epizy.com/a4_lined_paper_template_to_print_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/bluetooth_driver_dell_latitude_e6400.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/43638191536.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/durex_condoms_size_guide.pdfIn PDF document text
    • http://vudebedof.rf.gd/javed.pdfIn PDF document text
    • http://gurelijefumodaw.epizy.com/vubosagodaluvubegek.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_off0000d45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 5304 bytes
SHA-256: f4cab9712bbd018556f260536e6a77656c57b203d72226dd7fd08a9c6d596661
font_01_sfnt_off0000e67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 10352 bytes
SHA-256: 0ae143f4f7b1c64b954995b96a38801092ed6a5989d9b48d4fc0a1bc38079a94

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