Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c4012d20e49905…

MALICIOUS

PDF

71.2 KB Created: 2021-02-20 16:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aaae18f5a04a77297d82df13a428eae0 SHA-1: a8bd7997b12e9aa4de7a52d3f35ceabe076bbdbd SHA-256: a8c4012d20e499054d5529e73b29452cd2617014836c3c5d87703270c0b710b8
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=gmat+official+guide+pdf+google+drive In PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/yihHhPf/lijawugotunufib.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/jaghogW/musicians_friend_customer_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/bhfhfjf/60383125353.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ibgfHii/sozokanefiwarenefaxolali.pdfIn PDF document text
    • https://tolubezilonis.weebly.com/uploads/1/3/5/3/135348590/93022261ab1451.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/rizezobabub/macbeth_act_2_scene_1_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/julabaxamazizazapewuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/dell_u2515h_monitor_specs.pdfIn PDF document text
    • http://doboroguvenuv.epizy.com/86321821388.pdfIn PDF document text
    • http://lodaxiku.rf.gd/88075621161.pdfIn PDF document text
    • http://mapexas.epizy.com/79800247587.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/tratamiento_para_asma_bronquial.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/italy_travel_guide_in_winter.pdfIn PDF document text
    • http://xejarejunap.rf.gd/archived_conversations_android.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/tezokaxinosemufeditape.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/delaware_articles_of_incorporation_certificate_of_formation.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_off0000d944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 5388 bytes
SHA-256: a0b18db6aaa027f13fe57ab4d67afd0a6f8c9acec971944cbdf9ce616f62a823
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 10660 bytes
SHA-256: b964e421e448ba84f3022f52906021e2724a12c2214308ce664b02f235f301fe

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