Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba71fc8eb881651…

MALICIOUS

PDF

57.3 KB Created: 2020-10-16 02:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2a1754e358e393dd83eced03e3b7fbd8 SHA-1: 454b109304ce193c9511c1bdf1c8629b2eccade1 SHA-256: dba71fc8eb881651e92be0c1f27de2bde389823f313cc404218efc5d8e1667bf
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/pify?keyword=histologia+del+pancreas+exocrino+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f88d226b79c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f88da43c9956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f88294158c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f88548191a8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/proiectul_rosie_graeme_simsion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0459/0742/files/keeley_java_boost_oc44.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/surety_land_title_crestview_fl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5349/8019/files/graph_of_cos_x1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/kuxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/8932204989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/xuvobowomepapax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/wartsila_evac_vacuum_systems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0530/2168/files/vawiwivegele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33201a8-5417-4dc9-89fe-374a6c5118f4/1409907267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e391cb-b973-4a15-b6e9-171b4f55a291/65833224055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e382f3-2d0f-4aaa-93c2-d743556d7b40/42474888071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59532e6f-14cf-4076-bb52-a570fd265727/78879639310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f813720a-28f1-42c0-b7dd-ea86e7105633/poginuvivizij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011263cf-be62-4580-baba-2ecdbe103610/pudenupuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bea40e7-18de-4c22-8045-a534b1999049/lujalukoxan.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EE 5140 bytes
SHA-256: 0b9e4decceed744ed93d6f7b47404c3ab25548547ffca0d3dda0c6e72b9ac9e8
font_01_sfnt_off00008b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B67 7540 bytes
SHA-256: d12b7c89bf5ebc9167b1feb7c7ddb56284154083d9acf91de533736eda6068cb
font_02_sfnt_off0000a43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA43A 10192 bytes
SHA-256: ef9918137e116e5a572af6de0994297c72d3280ba0f0e8542e754208c9f90861
font_03_sfnt_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c