Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a215aafb1f3af68…

MALICIOUS

PDF

43.8 KB Created: 2020-10-14 22:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d48a1c0791360c24d2cf1715de5000a7 SHA-1: 671e589db8be9577e2b4c3708f178fa65ade6705 SHA-256: 5a215aafb1f3af6871ac51a1c826f2705636f582db629dcec9bfe0bbf7c3d582
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://ggtraff.ru/123?keyword=npv+and+irr+examples+pdf In PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/da942785a349.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/lekoxutawaf.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/xezatet.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/7878292.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/efb45fb9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f87533f2b533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87138d849e0.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/7bb65a66-b8de-40e4-8b14-76d4f5f40bdf/27501635490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960254d0-eaf5-42b6-bd08-b078432a0bb1/84965235408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7489a1-d358-48cb-a949-c9c9d1f1ca44/puwotibobibunikogatus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2805/6728/files/techboston_academy_basketball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0873/9488/files/27537199698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/henrik_ibsen_a_dolls_house_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7915/8948/files/pobasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5248/9662/files/seaoc_seismic_design_manual_volume_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0436/1366/files/1804_silver_dollar_fake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5277/6603/files/58598853880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9754/2822/files/suction_cups_for_glass_coffee_table.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_off00006ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 5284 bytes
SHA-256: fdd715b4d811ea2e2135f001cb6dae169a5d56696a00cf3ae662a63b62f7fba8
font_01_sfnt_off00007cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBF 10888 bytes
SHA-256: 897d6a724dd6664c2a9cb80814f8d04d661c32771293e2dbc4e55304bfb67fee

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