Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee3d9af0368881a…

MALICIOUS

PDF

38.2 KB Created: 2020-10-06 10:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b1217c981db01e7af844cd66bc2ab91f SHA-1: 3a1107a2a27dee10baa3674f9bf73853bbaa02bf SHA-256: 7ee3d9af0368881ae93b9dae2547058e72658bae0352051a79d55ce3cc194d7b
210 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/strik?keyword=towing+invoice+form In PDF document text
    • http://mesaz.jseequipment.com/uploads/1/3/1/3/131382982/vovekot.pdfIn PDF document text
    • http://files.noelandjackiesjourneys.com/uploads/1/3/2/6/132696128/143318.pdfIn PDF document text
    • http://files.vidanaturalmx.com/uploads/1/3/1/3/131382680/nigitizet_vinegabisuxut_kusorazajeles.pdfIn PDF document text
    • http://files.citizensdemocracywatch.org/uploads/1/3/2/8/132814476/lavup.pdfIn PDF document text
    • http://files.trueblueaustralianlabradoodles.com/uploads/1/3/1/4/131438058/tuponunifegup.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/1/0432/0935/9517/files/91215366038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1631/3758/files/74206325749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7273/7446/files/gta_apk_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8424/3878/files/bill_cosby_fun_game_unblocked_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3695/9139/files/art_of_animation_cars_suite_floor_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49271347-ab8e-4b22-bcd3-7c2ad714da33/fewofuzukesidufuvug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec3b43b-d3cc-441d-a558-ecd5645933a9/90023772840.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_off000059f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F9 4880 bytes
SHA-256: eee386f2d466eee16c2316781015dcaaf7c6618ba2cea26038a4e0ccdccf0cc3
font_01_sfnt_off00006aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA5 9908 bytes
SHA-256: 374edbc5987977f341b38c7b77eebed9664734638ad3b579c1a315a4f5a251ee