Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a424b861dd3d083…

MALICIOUS

PDF

74.2 KB Created: 2021-03-16 00:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 78401d5d0c933211ba5e3589b3ed0f1e SHA-1: c8b6c7b0516dfb1e2b37024c8960482e741906a4 SHA-256: 7a424b861dd3d08369876300f515e9322049ad9437d02347924ea9615a0bc896
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://midufefew.ru/wix?keyword=what+are+the+3+g%2527s PDF link annotation
    • https://cdn.sqhk.co/pixazizaze/cABjbyk/swamp_attack_game_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/hfiblxa/latigiruvelalam.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/ghZieeO/27365609020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_6041eecdd138b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fc6b85b656d0.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/death_of_a_salesman_biff_quotes_about_willy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_60469173b1e9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368748/normal_5fc604eed2dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5fd34d062b250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_603969598550f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_60406addd5324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472182/normal_604dc4d0580ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5fc9dd2b4523b.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/jLggiiV/word_crush_level_563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_5fd9f6fb43138.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/gikojoval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_602a4fa760600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_6004e5e62dee9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_602a512003175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_3a5b13cd9129458082f9e70bdb2b203e.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_3c74245584544d1db635360d202dc4dd.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_02d804597d674f0e89012af319c578ce.pdf?index=trueIn PDF document text
    • http://benamow.myartsonline.com/16838438212.pdfIn PDF document text
    • http://luvetux.myartsonline.com/administrateur_base_de_donnes.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_6745d5f7129341d2856d9cb4a51ee697.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000d6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AF 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 5124 bytes
SHA-256: 93351621c77bb59472c425e7b78ec08d6e3dc00e3a06f24fddd88144a0f8b6cf
font_02_sfnt_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10292 bytes
SHA-256: 0c301f75d046fafb3e5ba181fc4e8c5842aa0cf2ea60b7a8df11599d5078a938