Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d27b72b1194bd5…

MALICIOUS

PDF

40.0 KB Created: 2020-10-06 19:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a920fec7e4251e8baab065d9711eac04 SHA-1: 734f060adce9098600352840ed5835564c35b73b SHA-256: d5d27b72b1194bd5df4eb24a6e55b5a17ac628a56b0f5ea2db8d9a3170588835
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://cctraff.ru/strik?keyword=street+corner+society In PDF document text
    • http://werurovu.pechtercriminaldefense.com/uploads/1/3/1/8/131858685/813910.pdfIn PDF document text
    • http://tilis.glasgowlands.org/uploads/1/3/0/7/130775176/4739981.pdfIn PDF document text
    • http://xobuge.edgeglobalsupply.com/uploads/1/3/0/8/130813528/safipiti.pdfIn PDF document text
    • http://files.bridgefarmplants.co.uk/uploads/1/3/1/1/131164297/45b47589afcd4.pdfIn PDF document text
    • http://files.designsbyjmartin.com/uploads/1/3/0/7/130775668/bdabe67715980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/033f706b-ca3a-474c-adf6-d61b43e7c81d/tofudisogukotazavivaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7c1db8-3ec7-4d10-bb3a-b5a660aea14b/gifalilakojomedodipiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e69ebc-eb67-49a4-a936-6a51f97486d9/limuwebazaxapukuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6924/6102/files/gigejefasarawozuxoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4722/6024/files/bevarirotutikoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/ronnie_radke_daughter_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6400/3233/files/heat_shrink_tubing_home_depot_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/android_studio_signed_apk_crashes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6501/4432/files/marilyn_monroe_color_poster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0472/4901/files/john_smith_mapua.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_off00005eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 4756 bytes
SHA-256: f3a3723ba76a44f397b16ebfe1ecc61083653149f91caf418c5776865fbcd964
font_01_sfnt_off00006f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F35 10640 bytes
SHA-256: 0f96d73535c232aed6459497842f4c2e573b196c0d6c626727eab6546ee3f834

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