Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecd5b756ff92a65…

MALICIOUS

PDF

87.6 KB Created: 2021-02-05 12:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cf7c7b5a886cd2835c136f66d4c9286b SHA-1: a928053630a46e48d365444d00f23d5b3d923dbf SHA-256: 9ecd5b756ff92a655dab265efe799e7b0f64c01424d79e9ed912e0f13edc4c07
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to harmful content, possibly disguised as a movie link.

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://jottigo.ru/aws?utm_term=bleecker+street+full+movie PDF link annotation
    • http://dupomixu.iblogger.org/nejelagodupotojuw.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/2891225.pdfIn PDF document text
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/4608946.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dakokaxawizepu.epizy.com/blue_eyed_leucistic_ball_python_information.pdfIn PDF document text
    • http://bawibas.rf.gd/98944965584.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/9525273062.pdfIn PDF document text
    • http://bijalupukupami.rf.gd/5387624913.pdfIn PDF document text
    • http://pakafadudu.epizy.com/c_template_class_with_constructor.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/transformer_220v_ac_to_12v_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/jemovitej.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/72648898000.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/91942553763.pdfIn PDF document text
    • http://wosazegaguzi.rf.gd/poketiwote.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/mcalister_s_menu.pdfIn PDF document text
    • http://gizogebinide.rf.gd/caxton_college_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/vibegagoviranig.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/wallpaper_car_and_bike.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 4992 bytes
SHA-256: 6715d382107e990b14872a8fa5763c0a70f120759a6574569b9863dbb5cef714
font_01_sfnt_off000107b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 2332 bytes
SHA-256: f8a781ebfd592b9290257ae78e7da18348b5939b6c25cde6f3e73f55edf4537f
font_02_sfnt_off0001121e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121E 10940 bytes
SHA-256: 9bd7925bbd274e50247fdf3066d3f228cb9fe1f71b013e3c2ac91dfb488424e2
font_03_sfnt_off000137bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BD 17072 bytes
SHA-256: ae03a6c0574697da68e13aa4fd091461af98711adc92b4b89c2d9fa53aea5f20

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