Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dee628be6a9cd4…

MALICIOUS

PDF

68.1 KB Created: 2021-02-15 16:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2a38fdafa2d502560d5032a507917e4f SHA-1: 7afba0ad3937cdae9eae0e5a941d2b3b4498f870 SHA-256: 95dee628be6a9cd44c553c08a9df8acd70ed9443956a3bf05622ba4e335f33f4
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/123?utm_term=hp+officejet+j4500+driver+windows+7 PDF link annotation
    • https://metoxuxiduwano.weebly.com/uploads/1/3/1/6/131636764/7ec8df268c1.pdfIn PDF document text
    • http://risiwivozival.iblogger.org/z_camera_photo_editor.pdfIn PDF document text
    • http://xafesalizupapal.22web.org/tumitojedapuwekem.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/tezikaweju_rojirezenuzel_jalineb.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/peviwa.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/5832933.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/poputimegelu_rikikagok_rewole.pdfIn PDF document text
    • https://xezajorawelo.weebly.com/uploads/1/3/1/4/131408008/d0f84597478.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/57c4aa5.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/fuwenoxuzasila/c._v_form_arabic_and_english.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/pejuzigazanixazugud.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/consolidated_balance_sheet_example_uk.pdfIn PDF document text
    • http://zotibulavozixu.rf.gd/free_template_powerpoint_animasi.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/21412167483.pdfIn PDF document text
    • http://risepaxazitomep.rf.gd/puzzle_fuzzle_answers_cottage.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_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 5528 bytes
SHA-256: a2f2faabeb777f844b2e8f63243d4830d6f9b52b8746950a830fc763a8ab51d7
font_01_sfnt_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 10260 bytes
SHA-256: 376586bf90742e787df0e5d2818e0312754e6e8bf1d766278c49498479097cc1