Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bfa541b7a44832…

MALICIOUS

PDF

80.5 KB Created: 2021-03-29 11:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 505d00ec0d69df2c061ec95a504ec20d SHA-1: c8ca5e189861dd6148e94811d8c90f35538189bb SHA-256: e5bfa541b7a44832f1c0a4ae3ffcff02efa40d93c0e18b01c20e0707d948b6e8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jacksth.ru/award?keyword=best+guitar+learning+book+for+beginners+pdf PDF link annotation
    • http://forkidsshop.online/metta_world_peace_wife_jennifer_palmaneiiq.pdfIn PDF document text
    • https://mimuromujalu.weebly.com/uploads/1/3/0/7/130739347/xisakiwuzebebaw-wavunajafinodeg-gitibapeze-ruruneluvulilig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6012cab1e1ede.pdfIn PDF document text
    • https://cdn.sqhk.co/falupuvevore/jdidLid/hay_day_online_coin_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456663/normal_60517e5e2a10a.pdfIn PDF document text
    • http://christmas-gift.ru/wigotogegoliguzowebu6rme5.pdfIn PDF document text
    • http://zoomita.space/84684886979625e7.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/eXibEiP/oceanhorn_2_apk_obb_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/hwieCEc/slidemodel_powerpoint_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/chfjjhc/fruit_shoot_fall_guys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5febfe351dde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fd858a49a21b.pdfIn PDF document text
    • https://toverumu.weebly.com/uploads/1/3/0/8/130815437/viboxe-kebovexutir-gixid-rebiri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/upsc_online_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/c_n_rasio_tanah.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/instagram_story_templates_travel.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/rekuxinomufifu.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/612698225.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_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 5464 bytes
SHA-256: f04a9c7f84c35d55c497db6635d800451645f030606b7efabc70e364fc16dcf5
font_01_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 11104 bytes
SHA-256: 06b1faed53a9755406f53f7cc4f5633f44cb7da0653cc07767577149d380172c

Open this report in the interactive analyzer, or submit your own file for analysis.