Malicious PDF — malware analysis report

Static analysis result for SHA-256 534afd6571284159…

MALICIOUS

PDF

44.2 KB Created: 2020-11-06 00:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: ab568bc02dfbfd3302a0e3c5ad4b8e4f SHA-1: 8e64189b6dddc6ac45f91e463b36a8ffcc1c162c SHA-256: 534afd6571284159ad9eb1750b12ecd3d1111232fcbea8f0cfdbc86b6e40047c
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://traffking.ru/aws?keyword=vtech+answering+machine+manual+instructions In PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/senudidimofasuliz.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/1250631.pdfIn PDF document text
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/dfd31d261e.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/xemelitasix.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/b52714536422d6c.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://s3.amazonaws.com/vazisi/jhjbvb_nm_l.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db22f1c-7c9a-4c45-be37-4d2e9fa1bf71/adoradores_en_espiritu_y_en_verdad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e2f99b-472a-417e-bc23-6a11d887156b/81107758752.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/14455046974.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/cherry_peppers_spice.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5152 bytes
SHA-256: df4c11653116f08f6794ac2cb94199eb63b321f25ae9044ab3f6c55e662254fc
font_01_sfnt_off00006fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 10508 bytes
SHA-256: d20675000ccfc652ca6a4a8999c554a0f14c012bc2b7d2f4f98e42deee93e36a
font_02_sfnt_off000093a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c