Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e5efa397f572e9…

MALICIOUS

PDF

44.7 KB Created: 2020-07-09 22:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 0509372e3c06cab65f19df600f5c3b81 SHA-1: 9687ddd62c7e528a9893cbb608f37e9412f2cb9a SHA-256: 07e5efa397f572e9d34ec10c6766b89b56daa2e452e2ed884558e9ed01ae7941
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. One prominent link redirects to a malicious URL, likely intended to deliver a secondary payload or phish for credentials. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a high likelihood of malicious intent.

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://ttraff.cc/wb?keyword=african%20american%20religion%20a%20very%20short%20introduction%20pdf In PDF document text
    • http://files.lordofmath.com/uploads/1/3/1/4/131409055/gajukeraxijuvofi.pdfIn PDF document text
    • http://files.clarksvillemusic.com/uploads/1/3/2/6/132680932/jufuroneg.pdfIn PDF document text
    • http://files.maryimmaculategallatin.org/uploads/1/3/1/4/131437471/9235714.pdfIn PDF document text
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdfIn PDF document text
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdfIn PDF document text
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdfIn PDF document text
    • http://files.mattkuphaldt.com/uploads/1/3/1/4/131454238/7750511d28.pdfIn PDF document text
    • http://files.westboroserve.org/uploads/1/3/0/7/130739488/1063422.pdfIn PDF document text
    • http://files.tunup.org/uploads/1/3/2/6/132681767/f6109.pdfIn PDF document text
    • http://files.ccjsermonstorage.org/uploads/1/3/1/0/131069910/a3d4287.pdfIn PDF document text
    • http://files.onemomentofpeace.org/uploads/1/3/1/6/131607023/gosiwosoxijisoj.pdfIn PDF document text
    • http://files.tilliesnevada.com/uploads/1/3/1/3/131379612/xapixivote-pipugu-neruxesivalu-wifuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wimaped597797669.files.wordpress.com/2020/06/81359005811.pdfIn PDF document text
    • https://nafegef.files.wordpress.com/2020/06/zutumabobuluvolox.pdfIn PDF document text
    • https://mevarariruw.files.wordpress.com/2020/06/bovetuwoxebodotusejotore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bojakotipizijogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zodotuxufaliga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.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_off00007004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 5604 bytes
SHA-256: 2a053f19852122dfda232df807740c026c6e35c6c80d644f5478f0e9c75e4652
font_01_sfnt_off000082e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 10008 bytes
SHA-256: 209741d4690dd5401b0114bcbcd9290bac593e595ac1a958d71c8c7766cdd2c2