Malicious PDF — malware analysis report

Static analysis result for SHA-256 93054bf9d13052d9…

MALICIOUS

PDF

41.8 KB Created: 2020-10-05 02:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 04b3adb18e7f3679623954f9cae527bf SHA-1: 95b1ffcc84fc91d546487af79859a4e218872d46 SHA-256: 93054bf9d13052d9bb1caceeddf7ac19988f47664bb1db768571911fdbf59ffd
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for users. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning attempt to distribute the malicious PDF. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or redirection attempt.

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://cctraff.ru/strik?keyword=ritual+romano+de+exorcismo+en+latin In PDF document text
    • http://files.haulksmaple.com/uploads/1/3/1/4/131438557/a0cbf7dad08e3ff.pdfIn PDF document text
    • http://xebebifag.hockeyaustralia.net/uploads/1/3/0/7/130775797/rivakipezatifesolu.pdfIn PDF document text
    • http://tajinegek.renataclo.com/uploads/1/3/0/8/130814328/9929613.pdfIn PDF document text
    • https://site-1038535.mozfiles.com/files/1038535/43469204784.pdfIn PDF document text
    • https://site-1038988.mozfiles.com/files/1038988/79267515966.pdfIn PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/xebedikeborado.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/f9d83525-3925-4e06-9285-84787993bb7a/xufobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f38065-831b-43d5-abcd-d9e7db129e73/kipemoremina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7a88af-0975-4b93-a6e9-1756dec14f31/94715165539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc73e1bb-3bbf-4b15-a04c-459b7ef4547f/vowuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b370f4-d710-4f3f-8c39-0153d45fb2d0/4395197695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16fe789-b777-4722-9abc-0a51b4368d42/67649294357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7799a322-c9e6-4642-ac16-a8a4112c7338/xedapusemeviru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5aa082-d544-4d97-895f-ba811a566f68/58405068440.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_off000062fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 5160 bytes
SHA-256: 9b4fa4b6ebb8df5623021b8b30aaafed4c2a10774949c4785f5ab71a34aad7ae
font_01_sfnt_off0000747b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747B 11108 bytes
SHA-256: 51744b7a69e4a0fd2efc951cba7a6b0076290ee8e275d77890a83f82fff5083b

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