Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb698c5eebcce25b…

MALICIOUS

PDF

87.3 KB Created: 2021-03-17 07:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: db5c006f46d820b6f609d57498b0bd7e SHA-1: 6d329b97d951f94e079c48a33bf5519ec5d14f04 SHA-256: eb698c5eebcce25b371c31c0ba6544991d567fdca8de67b44d1624f00d2a929f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing lures. Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', suggesting the document's primary purpose is to redirect users to other sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://jottigo.ru/wix?keyword=urban+economics+o%2527sullivan+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fc67e448710d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_603c2f913677b.pdfIn PDF document text
    • http://erkutungotu.com/noxozixy0xi2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389581/normal_5ff3c52e5777f.pdfIn PDF document text
    • http://goldstein.berlin/what_do_numbers_mean_spirituallyi0jge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5fe52f511ba56.pdfIn PDF document text
    • http://sodaapp.pro/fagobosasumezuzujumequzmj.pdfIn PDF document text
    • http://letogala.iblogger.org/balance_of_payment_in_economics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_600442d370471.pdfIn PDF document text
    • http://goldotzyv.ru/what_jobs_can_you_get_with_a_masters_degree_in_public_healthrjuvg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_4c62a7b4562c44048fcc1336f42a6161.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujodibu/the_funeral_trumpet_sheet_music.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_f8a0bc4cb3f34bbe97251a8c4c19e693.pdf?index=trueIn PDF document text
    • https://e8e7cfc7-ac4f-45dc-bc40-3e3b258c1d8e.filesusr.com/ugd/cac9e4_e200bb7b6c214b0e9096d2c972255bd7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/81378900774.pdfIn PDF document text
    • https://3ced707c-20bd-49bb-93f1-edb15be4e391.filesusr.com/ugd/e90305_6fffa18725e44cda9108345a0c8ee725.pdf?index=trueIn PDF document text
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_0fd4b7fddd614d3ab4a35a4d770214bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/import_java_code_formatter_eclipse.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_eeeeea1fc6444f98aa3a4aab7ea229e9.pdf?index=trueIn PDF document text
    • http://topuwagib.epizy.com/business_process_outsourcing_project.pdfIn PDF document text
    • http://wisunomimat.epizy.com/39196727613.pdfIn PDF document text
    • http://marilineme.epizy.com/pool_pilot_digital_nano_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/surobupisosidukiditewol.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_7af54b404e8f45b1bb460cb306ae17c2.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_1c571ec630d148e6b3203f0a7d58af34.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_421b0b60a919475e9e1cca618095940c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001080e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080E 5420 bytes
SHA-256: b0b60f2595e02decaa99fa8be172342bed2c4cf4a687265c970c21a5c55c7c99
font_01_sfnt_off00011a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6B 11540 bytes
SHA-256: 5f3af6122e1f869f9c138d92f7571341f14f65ec4514681f4e7a1f652c6d1c8b
font_02_sfnt_off00014139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14139 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2