Malicious PDF — malware analysis report

Static analysis result for SHA-256 801c4438221ad380…

MALICIOUS

PDF

67.5 KB Created: 2021-03-02 00:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 11e3bdeabf04fcae5adf43028d70d719 SHA-1: b49da1f9abddd7ef8f2e449306b578594a7ef426 SHA-256: 801c4438221ad380955860f4cad519dc8f86f879cfaf1172a718fb4ceec2ad88
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/wix?keyword=i%2527ll+tumble+for+ya+song PDF link annotation
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/lexivemiviz-fazanora.pdfIn PDF document text
    • https://jotozorofelafik.weebly.com/uploads/1/3/1/4/131405965/3145340.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/schlage_keyless_entry_not_locking.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/Ahcjauq/metavodiwek.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/932145.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/jeponowon/dukezexufujadituzaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cbse._nic_class_12_date_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/7459532620.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/206035803.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/vefumel.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/86418537341.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/sex_and_the_city_2008_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/migugebinevagijavepomu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/varugumujumokufasim.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_off0000cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1C 5300 bytes
SHA-256: e20a7783a090cbf89248cba8346118893a5ae77c9e9e7f4f50e16666496ef47e
font_01_sfnt_off0000de1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1B 10364 bytes
SHA-256: c5be045d9816536956ee73f86a5070c509e667dafb32481079ef1716595916a7

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