Malicious PDF — malware analysis report

Static analysis result for SHA-256 141c5599beb7e16b…

MALICIOUS

PDF

74.5 KB Created: 2021-02-25 18:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 24c7d1d835bcd7b0618aa12d25c92f80 SHA-1: c8809b0594e04141eec09dfc799f7facadb9cae4 SHA-256: 141c5599beb7e16bc904921ffc2dc234bb219b059aa8b458a0a3fc92a0b149b3
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://baarspo.ru/award?keyword=random+number+table+statistics PDF link annotation
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/5095595.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hbYMWFl/bilixaxolepit.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/keponetuxukoku_dogukidotuse_faweviwovugo_fudeve.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/solutions_molarity_and_dilution_worksheet_answers.pdfIn PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/5062d.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/tiduwe-loximixida-zutujovig.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/86693435725.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/65669901132.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/hidhf5w/39017918017.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/gijahjY/17241974449.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/muvevanepen/dodemuwigogazoxuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/57161983258.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/41126866030.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/wordscapes_answers_tide_ripple_10.pdfIn PDF document text
    • http://biguwaximi.epizy.com/24845037135.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_off0000e722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 5232 bytes
SHA-256: 509af5a553a83a5ea7127ab16a0f4566ab5c4332220652a259f0db14b1a21467
font_01_sfnt_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 10608 bytes
SHA-256: 18b9a82db775840ecb8b64f9201b53cde2e6a9bdc332ae32c21f866e89cb1158