Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b72008564f886f5…

MALICIOUS

PDF

46.0 KB Created: 2020-11-03 10:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fa1ea06a4d6d78fed72311aaaaa691bc SHA-1: 5bef18caf4538b6546e2b90f68473bebaf11cf19 SHA-256: 0b72008564f886f5328b14853cb79e22a0fb5900085529297b23aef1dadab7c9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. The presence of a large number of external links suggests an attempt to manipulate search engine rankings or direct users to malicious sites.

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/aws?keyword=bow+games+unblocked In PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/9acc31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f90d4ef5f482.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/vupineso_kadawebapibi_sodovejukol_dafiriru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8ac085c8ff4.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/2284198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f484d2e7-8346-4132-8b73-a5bb5f33d17a/1_to_100_numbers_in_english_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e28003-bce5-459f-9764-2977062eefd2/lotofagiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be3a196a-e4a8-4908-9f85-6af0e7da252d/podekolobuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89c7ab1f-23ac-4d4e-a48f-c2af2f548ce3/sixexovutefofirunupol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9705a840-b22e-4586-bb03-cf5c39ad680d/lofurufedamujiveduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7e6047-f485-4ece-9c1f-663c028f7caa/xuwisekabekiruxiworiwose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e769092b-1b9a-4e4a-b977-d9c3e8c2ff31/92577860838.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_off00006587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 5260 bytes
SHA-256: 897fffdc5cb75935fb9d62808ad868cd47eac18cc191c4986fe9fec67a7e1ab1
font_01_sfnt_off00007766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 11120 bytes
SHA-256: 9c4513ec766b680d83214e765b1be7341d8b369e2f8daca131273b45b12b2a0c
font_02_sfnt_off00009d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D54 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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