Malicious PDF — malware analysis report

Static analysis result for SHA-256 0946f00aba6e664c…

MALICIOUS

PDF

96.0 KB Created: 2021-04-10 21:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 04f27979886beb30d21f43b99a7554c1 SHA-1: cfb1f6c30b6c28495dc11a13a43f2b9b2c69175f SHA-256: 0946f00aba6e664cec4e8c0020110009e71ec4af44c4313b44014ccd72828612
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. The embedded URLs and the nature of the link farm point towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=what+happens+when+a+stock+goes+otc PDF link annotation
    • https://gekojufoj.weebly.com/uploads/1/3/4/4/134438070/3544527.pdfIn PDF document text
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/8395118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_60417e5db869e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380876/normal_5fcbc96634a42.pdfIn PDF document text
    • http://mmuuue.space/mermaid_skins_for_minecraft_pet4940.pdfIn PDF document text
    • http://vuvezalamosi.22web.org/jesus_calling_book.pdfIn PDF document text
    • http://salonapp.xyz/44771089972y0fy9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_604eb810bcdf1.pdfIn PDF document text
    • http://it50disconto.info/kowanazukuvomajigoxijeruv6d1sb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_6037af61ac47a.pdfIn PDF document text
    • http://help-business-media.com/home_based_bakery_business_plan_sample2gclt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_6030fb1392364.pdfIn PDF document text
    • http://circus.market/31109757869sfmi0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxaxesaxejov.rf.gd/wolipiriwibasuvo.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_31211f8c3045453c9f52ea3fc5a46292.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_ecb8c75b765d4396804d0f944c194e3b.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_db209044f4f34646af71ed65e16cb908.pdf?index=trueIn PDF document text
    • http://waxozex.epizy.com/nts_dm_answer_key_15_september_2019.pdfIn PDF document text
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_2bc71dc8b093434fbc5a07d42118d5ee.pdf?index=trueIn PDF document text
    • https://c538924d-9290-4e35-808b-5013ecaac822.filesusr.com/ugd/047ea9_33f65b92983c48de9e1efe312c30fc8d.pdf?index=trueIn PDF document text
    • http://dexixikix.epizy.com/2019_acura_rdx_owner_s_manual.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_d68c9de5b3c94376b759f71ca5208fbc.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_644d56045dae4e808728d137e20bea87.pdf?index=trueIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_d1bbb9f3f1b24a189cbeb916d1b87cf1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 5236 bytes
SHA-256: 363674d934f9dcf96555591bf9893c1de0e1187ce3bb10e846005e84af26eebc
font_01_sfnt_off00014946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14946 11524 bytes
SHA-256: a78333faaec7702cf4acee3d904334e724f680bda1ade279531d9c40000b48d3