Malicious PDF — malware analysis report

Static analysis result for SHA-256 690b3cb68fb76499…

MALICIOUS

PDF

67.1 KB Created: 2021-02-13 15:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ba3bbd94977d08f0d89f27eac0ac6c3d SHA-1: 4d46060cb8e30f7ad5ffa4b0b8e360ddcebf5c01 SHA-256: 690b3cb68fb76499d62a23bddecbcb889430b60eede6b041956f53e27647a0a5
254 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
  • 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=hy-tran+ultra+for+sale In PDF document text
    • http://instup.xyz/baku_azerbaijan_tourist_informationx6eak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_6023a1591d02e.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/egficoK/axis_360_login_hcps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ff1fa3813e4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_60230f52af200.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/b52b314610ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_5fe7882c2e96d.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/figJirn/super_hexagon_unblocked_games_66.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/dihjcgg/vintage_snake_eyes_golf_bag.pdfIn PDF document text
    • http://varerafuvurine.22web.org/anexar_email_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/Q6wjchW/dukeriti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_601369e8cd2ce.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/zamuriza/4034317506.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/mortal_kombat_11_android_version.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/felolosunebetafi.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/dinap.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_off0000cae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE4 4856 bytes
SHA-256: fd6c1ef8e9ce37ffb68090e5c7c6ca6113535308fedd9ecc4e2e707a7a81fa46
font_01_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 10536 bytes
SHA-256: ddc0ffb125fe90d824bfe9140931579aaa59e7af9179787baad285348079560e

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