Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19b682fdeb1427a…

MALICIOUS

PDF

44.1 KB Created: 2020-10-16 10:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d4d3a24ec67e6a5cb0f2eea4947940d3 SHA-1: 6f9dfaae3a4ee625350a75327131db2d4eb6a33c SHA-256: f19b682fdeb1427abd931fd596e846e6b09d4e2014d263822b60c4dc9ddde53c
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://gettraff.ru/123?keyword=release+of+liability+form+car+accident+pdf In PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/kumix-dezomes.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/rabusawab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87176cb4fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f894bf6a1abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f87f5ca4821a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f885fb08186a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f87631f3e7b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f891aa0f10ed.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/ac1fe7cf-f162-4265-8548-687cea2a57ad/2023218855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc40ca32-5b5d-4c28-80d0-2ddc84509912/pizozovizolidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1732205-5213-406d-ae5c-8d5d69d47666/363525435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09acf1ab-9f14-4f60-81f9-4e1cbe6ab88a/warinaluvisonagexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c532c3be-36c7-44af-93d4-73ac25ab904b/buletanel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3057/5787/files/jejaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/wegurikavifimotapewabonew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/31151680296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7011/9318/files/allan_quatermain_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2055/1845/files/jupigojav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3036/2304/files/facebook_descargar_apk_mirror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7937/3478/files/15796965636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2786/files/tagowemezozuguwej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0501/2898/files/81135148401.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_off00006de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 5548 bytes
SHA-256: 981826672102c8d89ca7d339ad5682b4ecc10cbb3be2537e916c545867d5a88b
font_01_sfnt_off000080a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A9 10020 bytes
SHA-256: 8daca1e3fec1387dea3bb065ee8d708da85949705dbf492e6323b3ce0160ab20