Malicious PDF — malware analysis report

Static analysis result for SHA-256 965e4ff8a2446c07…

MALICIOUS

PDF

82.6 KB Created: 2021-04-05 14:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 50033978b477350d22532b8386c2bbb7 SHA-1: b451e555647b003d297ba9bcd02977ff8a0cc352 SHA-256: 965e4ff8a2446c07f2f429e515badaf833a50b0207dda970728a6df8f70df7a4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=50+examples+of+regular+and+irregular+verbs+sentences PDF link annotation
    • http://tuimag.ru/hitman_3_movie_castgy5p0.pdfIn PDF document text
    • http://xuzotudaraderuf.mypressonline.com/gawodonamuzemakidam.pdfIn PDF document text
    • http://vashmaster.info/asus_proart_pa248qv_drivermthu8.pdfIn PDF document text
    • http://kukushka.space/arizona_corporation_commission_form_d_filing83lmz.pdfIn PDF document text
    • http://wobifotos.mygamesonline.org/administration_skills.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/abbyy_transformer_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_605d8d3029b39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420260/normal_5fc7fdb02d70f.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/44922616175.pdfIn PDF document text
    • http://amsidgi.xyz/huckleberry_finn_movie_streamingxr6ye.pdfIn PDF document text
    • http://namelesssouth.xyz/66805517554nim15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_6057a02e75f8f.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/3ce0b942-05b1-4e6b-aad7-5d8da942acc1/99418411352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0044a-9bbe-424b-bc27-3af97ca34445/19144020210.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_b52304650812452992a667227fe5e66e.pdf?index=trueIn PDF document text
    • https://3c31dc6e-14a3-4e60-a373-897e90814001.filesusr.com/ugd/9e17d8_5d316a3216ad453d9cca268309523383.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/416cbbf5-5000-48e0-9d74-3b787192bcaa/the_motorcycle_diaries_chapter_summary.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/fast_food_restaurant_equipment_list.pdfIn PDF document text
    • https://c3e780e1-a1ee-422e-80b3-2bf79490ff1e.filesusr.com/ugd/dc7b26_016bc2d01cd44d9e9f6430a69bc23ec1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62960690-cbda-41af-8adc-74aca0778e30/gns_430_dimensions.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/27188850447.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_5d189e1e6325459b8d7b75df771172bc.pdf?index=trueIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_f6642c143e0746afad14dad3c88f0982.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_off0000ea3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 5916 bytes
SHA-256: 559b5ec887406623a71d00514395b0e13546412de2024555dbcff18d01559aa8
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 10488 bytes
SHA-256: c8dbd57ce9b4d3e3393bf3b7982268b63fb0c9c305f83333ecf7d78ddbae0727
font_02_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 17476 bytes
SHA-256: 9e22d99e839a65ebcae36c8aee2647b715b357b0a971283f4a2d41cf81318bdb