Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82e3b9486decf43…

MALICIOUS

PDF

43.0 KB Created: 2020-10-08 03:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2000ae7fc744591ed0de5e7d9f9ca6b9 SHA-1: d75e08120f5c73d1725cb89c649cd6a20bacbd0e SHA-256: f82e3b9486decf43b5c3dba7169d6c05b86620184269b926ba4398c4af56c86f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with several pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'dragon ball super broly english dub', suggesting a phishing or spamming campaign. No scripts were extracted, but the presence of numerous links indicates an attempt to redirect users to potentially harmful 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://ttraff.club/pify?keyword=dragon+ball+super+broly+english+dub In PDF document text
    • http://files.barrhaventravelclinic.ca/uploads/1/3/2/6/132695575/witaxagatuven.pdfIn PDF document text
    • http://rigos.milwaukeetoireland.com/uploads/1/3/2/6/132695649/boxefasexupa.pdfIn PDF document text
    • http://files.loetaconsultinggroup.com/uploads/1/3/0/7/130740442/gufukosun-loxesamobam.pdfIn PDF document text
    • http://files.glencoutts.com/uploads/1/3/1/4/131406289/92af960e9e0.pdfIn PDF document text
    • http://files.learn2playmusic.sg/uploads/1/3/0/7/130775752/1204283.pdfIn PDF document text
    • http://kexabixog.findinggodspeace.com/uploads/1/3/0/7/130738971/melet_zuwikodapapag.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/c00c233a-8c6e-4260-84c4-14744688a7ac/poboridujapew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d0298b-5983-45db-8ceb-e5de0447a442/lotamutagaxikesozire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd54bf8c-c071-47f1-8aa6-22a3058c82b8/88146580252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07306c0-0ec0-49bf-8e3d-c493b72a3902/24072209376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfcd8a4-124d-4b37-84e2-ca4820326c46/xiroropakuxopuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453a92d9-21cd-473f-9db0-26ca295ea7f4/gokamezavesanifumijejil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0a22a8-3f99-4b63-9695-2cf67a314bd0/5365410449.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5089 5464 bytes
SHA-256: 70ecda2f5a0d5f6f7557a17bb71d122d69166f71d94f24ce1e5624607bcd865e
font_01_sfnt_off00006318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 9880 bytes
SHA-256: bc658020be60eff2c00ab21295d77979de6ded627a432040bfb3f19a90045974
font_02_sfnt_off00008512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8512 17560 bytes
SHA-256: 2dcdabeba45fe7c21bbd24c083d89effee6e80b44c05a807e6b941b80815c78e

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