Malicious PDF — malware analysis report

Static analysis result for SHA-256 a823a256edfb05a0…

MALICIOUS

PDF

73.1 KB Created: 2021-02-28 08:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1a9648d8ada865ac7e707f6cd3df65b2 SHA-1: 72263712a34202739558b444899f344d080aa56a SHA-256: a823a256edfb05a0df938b74c044440f26445ea954bffc4311426f3528d1d99d
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://botokaw.ru/wix?keyword=clash+of+clans+town+hall+8+battle+strategy PDF link annotation
    • https://cdn.sqhk.co/vopunokapire/d1ZhCgV/oztent_foxwing_270_degree_awning_series_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/dighhAs/crossing_jordan_tv_show_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/sarimotel/uhdjjjd/26336708570.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/lubenof.pdfIn PDF document text
    • https://wekexodaxax.weebly.com/uploads/1/3/4/7/134713384/zaduxu.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/39486725040.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/b39d2b8c52bc05d.pdfIn PDF document text
    • https://zawiwiguxasawum.weebly.com/uploads/1/3/0/7/130739629/166c274ec1ad.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/twilight_book_series_amazon.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/fizotapot.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/gasupata.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/sifawekujiki/8922874812.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/unclassified_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/gutadimuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/asme_flange_standards.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B4 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 5576 bytes
SHA-256: 06a2a262b49344f0a0848021c50e64476ac80549cb0d779c9c22b1cb1238a039
font_02_sfnt_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 10128 bytes
SHA-256: 278d4307b0e06ea6325a40fac34940ca6694dbc758748349ac606beeb884f005