Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e3a1a1286a738…

MALICIOUS

PDF

69.3 KB Created: 2021-02-27 12:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1ebb450c6dccc9c3cac62bfe3ffc4da2 SHA-1: b2ce845c36209e057f3493d568573a628565aefc SHA-256: 3d9e3a1a1286a73845d9025ad55a176653981e8dee0fe10c95ffca0575b9e1f6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/award?keyword=eureka+the+boss+smart+vac+yellow PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/how_to_drain_swamp_cooler_for_winter.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/hhjjxVS/mipiguxawidu.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ginU1gd/point_slope_form_equation_calculator_with_two_points.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/PeM9Dhf/549330343.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/15Tiaib/79492650415.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/how_do_i_reset_my_zebra_gk420d_printer.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/Oijficy/25646939978.pdfIn PDF document text
    • https://cdn.sqhk.co/zimamoko/gfgfRIJ/46259058667.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/myers_briggs_personality_types_of_brooklyn_nine-nine_characters.pdfIn PDF document text
    • https://doliwejivus.weebly.com/uploads/1/3/4/3/134353379/2563146.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/ienrggU/religious_affiliation_of_supreme_court_justices.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/xeponodij/32024590064.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/flinnprep_ap_biology_answers_unit_11.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/49019243409.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_off0000d33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 5456 bytes
SHA-256: 39dcc37364eb15d0b85dcc484fe4b194d5a6636deefedb5165320e5ac0560823
font_01_sfnt_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 10260 bytes
SHA-256: 1f107d74b82b5f083e457466b552201a9a23899b90a4351cad1cfa59ee587567