Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fbd94a2a06fe18…

MALICIOUS

PDF

44.7 KB Created: 2020-10-17 10:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 826f32dd8485ce745db1be478554177e SHA-1: ad66460f046e7a92ca658426625c3606b7ff3c7e SHA-256: e2fbd94a2a06fe18a5b41ad0665e7e8329c212ee33fcc972020663ddc297373c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.club/123?keyword=exerc%25C3%25ADcios+de+isomeria+plana+pdf In PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/8c5bff6809a.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/filamovebitojiloxevo.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/8728124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f870e8aaf6f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f87c96e7708b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3449/2071/files/remove_navigation_bar_android_pie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4300/4826/files/levels_of_inquiry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6681/7182/files/61642713534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/magnus_chase_hammer_of_thor_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6780/0736/files/70791550107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20039e5-0d41-472c-aa31-56cdaf2a4c1d/nuwumutux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3eb5a3-cdb7-4de3-bce9-901a689939e7/74473310811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589763d0-0a15-4c2b-8c86-97a5a59fb858/77101117553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453cdbca-09b2-41cd-be19-00276863c622/jojeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b888bc-91b9-4ac3-a35d-83b17df01337/10396808510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f2f1c3-84c7-43d5-9461-86cf5d649352/debedovinumusobaxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b419df48-e991-4f52-b41f-80b8bbfadff8/99120156624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1502/0449/files/john_fogerty_las_vegas_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1370/8182/files/manual_crowd_pummeler_classic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8896/0416/files/72662123068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1159/files/bop_magazine_90s.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_off00006b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B98 5380 bytes
SHA-256: 8da9810cd97556cbce09ed7931271e78cc398b14adda82f5c581b5ba8e570ce0
font_01_sfnt_off00007dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCB 12488 bytes
SHA-256: c6023a2eb39f3a2df9e3caff9d7a4f7728fe3d89b9b19c888ef6d9d1b1f9aa21

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