Malicious PDF — malware analysis report

Static analysis result for SHA-256 500246c237695571…

MALICIOUS

PDF

42.1 KB Created: 2020-10-03 07:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f29e7d77c23c9579954d6053397ea667 SHA-1: aab13918c1cb2123ca7fbc482a1dbbc7e952f8c2 SHA-256: 500246c2376955716e4423b855995bc344e998b4e36b1f0edc443e1d0f5f4528
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious domains, and is flagged by heuristics for malicious redirector links and link farming. The document body, though obfuscated, contains a URL that matches one of the identified malicious links. This suggests the primary purpose is to direct users to potentially harmful websites, likely for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=cross+stitch+needles+size+guide In PDF document text
    • http://files.futurizeyourself.com/uploads/1/3/0/8/130874587/meragojadolaze_tezefe_benow.pdfIn PDF document text
    • http://bugolol.boneandjointdocs.com/uploads/1/3/0/7/130738732/razibu-kosikofigol.pdfIn PDF document text
    • http://files.aclhandweaver.com/uploads/1/3/1/3/131384260/2c7df9.pdfIn PDF document text
    • http://files.tomaah.com/uploads/1/3/1/4/131438274/dabesuwifutopep-weselobuwole-jugaxovit.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/7d422970-c8a2-4d3b-a81c-6f95c91c130e/39990632791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b7d818-7164-4dff-b73d-2a172e8dd9a7/38526311979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61e2185-99fb-4569-afbe-31230b38bbf1/sorevemoderun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0676ed33-0e29-40b3-a22d-3a531a8c6962/ritojazemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169d5f6a-fef1-4f3a-891b-33afdb73ad73/27910144409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab73fab-dbde-4a1d-be1b-dc90654fa9cb/varuzurevabug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5106591-1f86-4e10-95ca-52155de71765/1987613112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a5586a-2a38-4dc9-a3af-f6216b7df023/xeridewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/842293e6-cd5a-4981-bbb8-7b71eb959324/vibapopugegowan.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_off00006909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6909 4944 bytes
SHA-256: 9c16adf673b3f71b3bbe8955e9be20bfd55199b42bf06e69f7780d1935027932
font_01_sfnt_off000079d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D7 9956 bytes
SHA-256: 888e5aabebf8b22491a91aa33569e08ceb8bc768400e2d277e035ef7a58d2022

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