Malicious PDF — malware analysis report

Static analysis result for SHA-256 019bf1df0e7c9e74…

MALICIOUS

PDF

83.0 KB Created: 2021-03-17 14:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 73bbc7a844c1f7f4bb8690a1b6ef7a4c SHA-1: bedeb7ee78118f5ebeebcccf25932e5c699f239e SHA-256: 019bf1df0e7c9e74f52c6b7a2e9cc8a8ad2d380f2e00952bfdca9a0c3449b092
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=quotes+on+expectations+in+life PDF link annotation
    • https://cdn.sqhk.co/lotuwuzu/zgjzjaz/galaxy_watch_active_vs_active_2.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/jaAgfgh/steps_in_the_business_strategic_planning_process.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/hfifXjf/95583593393.pdfIn PDF document text
    • https://watoniworawi.weebly.com/uploads/1/3/4/8/134871767/maturo.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/jw2Pid7/65360337057.pdfIn PDF document text
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/3805a.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/vugaguwenumi.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/ojgig7g/bisuda.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/gfFhdjc/arcade_legends_pinball.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://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_81c5f7aebd474963af0783cebece3802.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/laginekux/ryobi_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/87050513767.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_fb7c3f728f414ba39ea948560417ce52.pdf?index=trueIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_c2dd7c4c2a3649aab80e04c32ba450d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/react_checkbox_without_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/45241677583.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/10558511334.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_d290eccbd74e48abaf86fd552614905f.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_ccfecdb89a834e02822c521a14e2b997.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_d925f40bede44ed68c8fa3808a5a1834.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_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 4924 bytes
SHA-256: 3d6caf8e368d4bc86333ce0f0baed616be05e7c2d42f9f65cc58bf2ce198dc8d
font_01_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 10984 bytes
SHA-256: 1922bafccf9f0710508fd2d414d430a8610e22d8e439942c86225f68e4254384
font_02_sfnt_off00012e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34