Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33e510a1d8cc3da…

MALICIOUS

PDF

74.7 KB Created: 2021-02-16 04:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dfd9c3a0f37662ef908369aa6fc7278b SHA-1: 4b3cfcfc94692716966c986ec7561df077a10d71 SHA-256: e33e510a1d8cc3dab8db3cfbfce25557dda175e8dbafad9eb8ddd7f2af34bbf7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=the+human+body+an+orientation+review+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fdc84d5307fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5fd880e06cf85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fcc821200967.pdfIn PDF document text
    • http://opencabinets.xyz/what_is_the_central_message_of_the_gift_of_the_magi5afu3.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/gsCgegc/food_delivery_near_me_like_ubereats.pdfIn PDF document text
    • http://test123test.xyz/orange_ball_gown_skirtvwmps.pdfIn PDF document text
    • http://weinmvc.net/adosphere_2_testy6lvxw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_601d8930f0e9f.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/t9IajbH/33045311172.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/dNXgegj/kesuxijatozub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420031/normal_5feb3f80919d1.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/universal_rolling_millno42f.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/Cgjgfig/jovufelureboxaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fda7a51393eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411493/normal_5ff1c13047d60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 5376 bytes
SHA-256: e3f49add1057796687c67998c3b5470256335fbf2ccc08f1d4e2eabc16265834
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 10472 bytes
SHA-256: 918c8a9b3bc7ced7743661cad0f4971715b7a64187e8bf0c4d67a4e35d910c42