Malicious PDF — malware analysis report

Static analysis result for SHA-256 2223faafa5d3c13f…

MALICIOUS

PDF

85.3 KB Created: 2021-03-22 05:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 579c2baca82ddd4ec5f021c11d70db8c SHA-1: d9014bc9f41984945133ef5e0898b44a8cfba8d2 SHA-256: 2223faafa5d3c13f04f4cccb660403b767737db86a438d80710bc2e80207d807
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and redirect to other PDF files, indicating a link farm or SEO poisoning attempt. One prominent URL, 'https://jumiwimov.ru/123?utm_term=mobogenie++for+pc+windows+xp', is identified as a redirector. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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://jumiwimov.ru/123?utm_term=mobogenie++for+pc+windows+xp PDF link annotation
    • https://s3.amazonaws.com/dubiditiginowo/infinix_note_7_6_128_price_in_india_flipkart.pdfIn PDF document text
    • http://jobipelulimobo.iblogger.org/compound_adjectives_worksheet_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/75499915879.pdfIn PDF document text
    • https://nonedavoxezi.weebly.com/uploads/1/3/5/9/135956696/niduroduk_feporavu_nunewute_firexeluzisidem.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/aca81b3d1ab2453.pdfIn PDF document text
    • http://zavodtriumf.com/mabomunoruruponozovonzvfj5.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/best_anime_apps_for_android_reddit.pdfIn PDF document text
    • https://xidiziwuzubiwon.weebly.com/uploads/1/3/4/6/134653180/sagoto-novobeso-nawegalaruzowi.pdfIn PDF document text
    • http://mishabelle.ru/nc_drivers_license_number_formatiwdf5.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/treatment_of_nephrogenic_diabetes_insipidus_guidelines.pdfIn PDF document text
    • http://guzofegarakad.iblogger.org/apprendre_l_anglais_plus_rapidement.pdfIn PDF document text
    • http://obschee.xyz/saluxovomopevabpzvu8.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/indigo_airlines_baggage_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/vovoposamimagedidefisoku.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/8214e3bcb01.pdfIn PDF document text
    • http://maewallace.com/the_healing_secrets_of_the_ages98pgo.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/55480762724.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://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_7eb4afefef9a402184d1d291f0151f65.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_44a2c218257b4110840f6347b902278d.pdf?index=trueIn PDF document text
    • http://nujexaraxeb.epizy.com/washington_state_basketball_schedule.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 5092 bytes
SHA-256: d8e14dfdac9670e726bb5b1266470e431f7528b42bd134ebecafbea101d164f9
font_01_sfnt_off00010fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB6 15736 bytes
SHA-256: 2d35c81b12a2473d93db36bf37b78b1728f1462fece5854edddcedf4741889a2
font_02_sfnt_off000139ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e