Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a6c88e47ec7181…

MALICIOUS

PDF

88.1 KB Created: 2020-11-14 15:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: de297a3f9e33e118a37d8242ee928534 SHA-1: c10ac81f0ec53ad91f802e85a2ec1d884a2d8fe6 SHA-256: 82a6c88e47ec71817a2f38851fab1d25559fff68508e42f4058c98c6db2a9c04
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/123?utm_term=kings+of+sparta+bully+the+bullies In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fa47df6e9b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5f9e2158891e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5f971e0c84b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fac4c1b1ca8a.pdfIn PDF document text
    • https://nibuxapevu.weebly.com/uploads/1/3/4/6/134601724/peretuxegematusaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fa336c71c223.pdfIn PDF document text
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/pikekove-kesosobilakebok-kinifupopike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f8d1b8fd7e63.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/407956.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/jinabom/lockout_relay.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/google_account_manager_8._0_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/75740090669.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/91432153332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc39191c-44b6-485b-94ec-f2de853b5485/gosodedorawewogawux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4026978f-52d4-43ea-b72f-dff358df4f0b/famosas_pinturas_de_frida_kahlo.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/honda_gas_pressure_washer_2500_psi.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_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 5376 bytes
SHA-256: 4f1fda6aebe0fc7b4797bbab4f88b1a46d6c8a92c97603c9bfb3cbc3039f8f83
font_01_sfnt_off00013026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13026 10244 bytes
SHA-256: dc701fa6a9120369e226c2ee7ca6084a53602dec52306b6e6d486f7d98725163

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