Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a2a703da2fa196…

MALICIOUS

PDF

66.9 KB Created: 2021-02-22 16:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 35e733e34206d429430317f1cd044390 SHA-1: c08e941660ae02312f4cabfa8430cbb2167f3ebe SHA-256: 53a2a703da2fa19661e8d23dbc3968de197fef33a021e4dd2402c99afe8a86de
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/wix?keyword=utah+statewide+warrant+system PDF link annotation
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/bb8f4eb00.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/17941932226cb.pdfIn PDF document text
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/tujudajonu-vosumufu-lepigolufuke-dajukevox.pdfIn PDF document text
    • https://lumuvimusu.weebly.com/uploads/1/3/4/7/134719948/rarofuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fda895ebed58.pdfIn PDF document text
    • https://pefibiwurabamiz.weebly.com/uploads/1/3/0/8/130874510/burufit_sanafija_tanugidefimu_pugobikolujo.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/494810293d0f114.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/zunaduxa/9511063537.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/piano_music_sheets_fur_elise.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/do_dog_groomers_need_to_be_licensed.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/new_proficiency_gold_coursebook_unit_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/remember_flanders_fields_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/xonuxubuvupetosenogiveb.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_off0000ca29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA29 5220 bytes
SHA-256: 252e6e6f4a8ae972f6f4c5f5b3fd9b6f3808fb514a8b80394a13a968fe429bb6
font_01_sfnt_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 10368 bytes
SHA-256: 05482d6c9ebce76e15a8cbfcef35dc09b78eef4d3fb8be8fb48f8d9a9f1d9d14