Malicious PDF — malware analysis report

Static analysis result for SHA-256 21dcc9e0731e3102…

MALICIOUS

PDF

53.9 KB Created: 2020-11-02 20:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 325ed9b975d8589a66e8c281217d07e3 SHA-1: 59b41874ed20a9d38d7846b966d927e7f42dbed5 SHA-256: 21dcc9e0731e310231fb4409ab7fb712599e93ef58ec1daf2bbbb991f106536c
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://ggtraff.ru/aws?keyword=horde+leveling+guide+1-60+classic. Another heuristic indicates a PDF link farm, suggesting the document is designed to drive traffic to various external sites, some of which are benign but others are unknown or malicious. The ML classifier strongly supports the malicious verdict.

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=horde+leveling+guide+1-60+classic In PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/birozalulup-gojarubag-regobagediz-bepiza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f9b73a40eb6e.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/4978552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f92fd587d6e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/acrobat_maker_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f308af-e35c-4a2b-addb-8052b2a65a7c/99517312204.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/tijetexifagevuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37684a94-0f66-4b78-b344-7e858c4f19a1/91260522089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1deb3f-1d46-417f-8fff-4b3585492e95/butupexumevevixeso.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/recumbent_bike_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71537fe-5adb-4b85-85ab-674c4ca4a16b/25017557526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7238aaf4-83ef-48ad-a2d5-1b9cba4f46fe/dokuriwamexanatawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325484f4-9931-4d44-83ad-b08e27153107/Brazlijas_sievieu_bezmaksas_porno.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/53422035998.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/baxusagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c53a99-dffc-44cc-b5c4-a7d579f22fc3/alcohol_functional_group_name.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_off00009462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9462 5508 bytes
SHA-256: d2bfc1dd330757c77e65400531ea66f4a6787472aeaf4f846266d05de2fac28a
font_01_sfnt_off0000a73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA73E 10508 bytes
SHA-256: bf4afe3d3987da5509c8490b949b303d1a5830a81469600f30ca10733519ea58

Open this report in the interactive analyzer, or submit your own file for analysis.