Malicious PDF — malware analysis report

Static analysis result for SHA-256 3986d179e8947a64…

MALICIOUS

PDF

67.6 KB Created: 2020-10-04 14:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 375ac0df15934492a37dd007542865d7 SHA-1: 649b36546dc3385286494c27813ae88788afcf28 SHA-256: 3986d179e8947a64dbfbc6a8707f2d3877fa28db158959998a70c8ca11550db9
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=austin+first+church+facebook In PDF document text
    • https://site-1039757.mozfiles.com/files/1039757/37594013155.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/dabexowu.pdfIn PDF document text
    • https://site-1038572.mozfiles.com/files/1038572/29572169446.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/28199026594.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/kifivumafivokel.pdfIn PDF document text
    • http://xejokune.sportingservicesdressage.com/uploads/1/3/1/8/131858156/zajisozi.pdfIn PDF document text
    • http://files.treschicshopper.com/uploads/1/3/1/6/131606123/wivepeme.pdfIn PDF document text
    • http://xegat.gregoryvann.com/uploads/1/3/1/4/131438641/1268661.pdfIn PDF document text
    • http://files.birnamwoodlabs.com/uploads/1/3/0/8/130874490/lodidixeka-gavabojofa-velukaxutuxabo-bijawoju.pdfIn PDF document text
    • http://zurof.arkansasartpottery.com/uploads/1/3/2/7/132740720/jajodigedazis-pekul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8840/7448/files/50827381647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/89823269437.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_off0000bbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEB 5132 bytes
SHA-256: e659802200a7e39b40fc12f31e1a8e0184d905dd020dc8796980a0c7bbab0d0f
font_01_sfnt_off0000cd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD57 5296 bytes
SHA-256: bbbf550728a1b692e78b14616e9e8cb5a169e850d71a00629ae6402eb061d9f0
font_02_sfnt_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 10396 bytes
SHA-256: 17d3c4f6f5abfd8344f94cf78d9cffcda38524d6a9b0ba59fb886ccff3232ba7