Malicious PDF — malware analysis report

Static analysis result for SHA-256 6280e145f9a49a98…

MALICIOUS

PDF

90.5 KB Created: 2021-03-22 12:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 048d734adef2a57bf4689bcf9ffcd56d SHA-1: 52e419cf90c68357b294da8326e6d0a7bd37e9ce SHA-256: 6280e145f9a49a982ae013234a9f39e26e69996351d15352af3a6c8dec5892ad
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/aws?utm_term=benefits+of+reading+surah+mulk+daily PDF link annotation
    • https://dupizonax.weebly.com/uploads/1/3/1/3/131380343/lejena_bajiluzeke_wasox.pdfIn PDF document text
    • http://com-signto5.xyz/nekizinnt7hi.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/dTha8Ng/ear_infection_drops_medicine.pdfIn PDF document text
    • http://goproits.com/tribal_leadership_by_david_logan1s16p.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/frgichb/hyperspace_xbox_one_x_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/I7AHhiO/es_parallel_accounts_apk.pdfIn PDF document text
    • http://bristol-yalta.run/how_to_work_out_pool_volume_in_litres9u18p.pdfIn PDF document text
    • http://hytri.com/54870541802h2pp.pdfIn PDF document text
    • http://limecash.xyz/davosuvakowiri7vqm.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/iFyPijh/73036283707.pdfIn PDF document text
    • https://zinebarovug.weebly.com/uploads/1/3/0/8/130814534/c311ce5b.pdfIn PDF document text
    • http://idealslimitaly.site/evicted_what_nextv90jm.pdfIn PDF document text
    • https://migobajiker.weebly.com/uploads/1/3/5/3/135390735/368152.pdfIn PDF document text
    • http://myfavoritesun.xyz/magic_bullet_banana_smoothie_recipesfjnod.pdfIn PDF document text
    • http://ryursew.space/notudewodivweh.pdfIn PDF document text
    • https://fudafovagovareg.weebly.com/uploads/1/3/4/8/134868702/9454047.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/hhjeifI/word_search_solver_iphone_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_2c50607713db4a9387db17482e092d99.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_ee6f352cda41446995159805976bf9ae.pdf?index=trueIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_5b3a423937e44876bae77897a57dfd52.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_d528ec9324e34d8f891e839d4e3d9422.pdf?index=trueIn 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_off00010612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10612 5536 bytes
SHA-256: a9604f19f0e1944a5bbbe12c6c7e14b2a9e3857761b22f177cd566ff4cc07aca
font_01_sfnt_off000118c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C6 14128 bytes
SHA-256: 0083f27d7f6b6f2e334a3ada8522cbfdaf28134850e34c358f145f21b75016a8
font_02_sfnt_off0001458c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458C 16552 bytes
SHA-256: 09392c960de46c90b820ba8812112d0cbaf2cfac873ba275798f2fb784eb8ddf