Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c058750227a99da…

MALICIOUS

PDF

63.8 KB Created: 2020-09-30 17:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fcef95bf07e35936f237c22771914136 SHA-1: 7ef62c82b030b117c3a56967a73d4fc3cf043761 SHA-256: 2c058750227a99dabddd381d7f5e3a07f21f97a8c52fc91a37aeac3e39ac46e2
184 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many pointing to disposable hosting, and one directly links to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to direct users to harmful content.

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://cctraff.ru/strik?keyword=new+asharamayan+path+pdf+in+hindi In PDF document text
    • http://vewixi.praisetempleministries.com/uploads/1/3/1/4/131438188/degajexow-zuzivemevot-gukiwaw.pdfIn PDF document text
    • http://files.sternulaba.org/uploads/1/3/0/7/130739696/2466410.pdfIn PDF document text
    • http://fezuj.hollylima.com/uploads/1/3/0/8/130814328/sasapatavuv.pdfIn PDF document text
    • http://zefor.theroamingfreelancer.com/uploads/1/3/0/7/130739415/xiforegaf.pdfIn PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/vowopipepefoxegi.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/640938443.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/47045754399.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/9338a59e-80f8-416e-8c85-4cb3dd73d717/godanulororufowex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d5771b-3c12-4b93-9bb9-b9fbad651d88/19289740639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4863ee98-83fc-4007-8fe4-72762501940b/9231098012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f64c4a-f46c-4f36-879d-92d9a835b572/pufuzej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3550c64-5535-4764-b137-a2d13b7b842f/18601670338.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B0 5412 bytes
SHA-256: 5e5c59f9e107b8d168a1feef9bf4f49f9bc281c6cd00ffaed0dc100a848ecca4
font_01_sfnt_off0000ac08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC08 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000b76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76C 10268 bytes
SHA-256: d10a194e3808f26bd5543c05763d0618c88ad58b906cd036bfe0ba36f1322b22
font_03_sfnt_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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