Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0dfe12257fcda6…

MALICIOUS

PDF

78.0 KB Created: 2021-05-07 01:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c29a41044c3abd5fb6ec43511c7ac1f1 SHA-1: 2630a1dd3edfcce034a690ed7b7ce763b2704a9c SHA-256: cc0dfe12257fcda61d6da4a491d2586040da58760c4965c4fa9eb039a7f2c40e
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or phishing. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute commands, a common tactic in social engineering attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://baarspo.ru/strik?utm_term=what+graphics+card+is+compatible+with+windows+10 PDF link annotation
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/3551664.pdfIn PDF document text
    • http://fexewivu.iblogger.org/2363946054.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/bujawalure.pdfIn PDF document text
    • http://arenda-comp.space/kurowugivijosarnx3g.pdfIn PDF document text
    • https://rovagurepuj.weebly.com/uploads/1/3/1/8/131856033/8ae9d48893ac17.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/164656.pdfIn PDF document text
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/67f81418c.pdfIn PDF document text
    • http://lapebev.iblogger.org/black_templates_for_powerpoint_presentation.pdfIn PDF document text
    • https://semanipiji.weebly.com/uploads/1/3/5/3/135312460/xupabatonebar.pdfIn PDF document text
    • http://tranquils.space/77833292884o5xyk.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/3e7e2a5f.pdfIn PDF document text
    • https://kepefiporewe.weebly.com/uploads/1/3/4/7/134704647/b861bea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefotifomasun.epizy.com/83809597696.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/bushnell_binoculars_spare_parts.pdfIn PDF document text
    • http://nofifejagarenut.epizy.com/13865278069.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/burgues_script_free.pdfIn PDF document text
    • http://zitovidenelanus.rf.gd/associao_de_resistores_em_srie_e_paralelo.pdfIn PDF document text
    • http://davutawopoban.epizy.com/pafipesu.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/ioptron_skyguider_ipolar.pdfIn 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_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 5928 bytes
SHA-256: 7d9bed452df1eef32f7062d38d8bc6cf31df093fe39f64f798d4577a6302903e
font_01_sfnt_off0001042e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042E 11604 bytes
SHA-256: 533db31545a2090b1f3102763a294feff63342d8549ed4510818f133b352d4bf

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