Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f63d149e48e730f…

MALICIOUS

PDF

82.3 KB Created: 2021-03-14 10:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2829ac2bb89855f65fd3ab8b471e711a SHA-1: 0deffe526e803bc9b7c12e03700922c9f7e0d00c SHA-256: 8f63d149e48e730f19f61cc1e3cbad5672f63ae91231d08afe31c6ea02a5300c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential phishing or malware distribution URL. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded links and the overall structure suggest a phishing or SEO spam attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=dyson+dc44+animal+hepa+filter PDF link annotation
    • http://yachtcharter.group/add_or_dd1bkks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fcdcb0adc120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420604/normal_602270f42e2f9.pdfIn PDF document text
    • http://tovelksa.website/netgear_wnr3500lv2_dd-wrt2y9u3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404116/normal_5fe0230c9d92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_60454616f39a2.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/kotodur/converting_a_grammar_to_chomsky_normal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/42960659929.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_51ab56b9d22542198f1d9838d761abe1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/healthy_gluten_free_snacks_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/ritevulixujazavozolesu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/regexetipit.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/clasificacion_del_derecho_subjetivo_civil.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/rogers_anyplace_tv_apk.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_5904df6d59ba4686a3b28d4b5b93aacd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/how_do_you_set_the_time_on_a_ridgeway_grandfather_clock.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/amazon_video_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/arjun_pandit_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/hungry_dragon_apk_obb_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/23185207261.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_5082ce0451b3463aa51c89b7ca0c3923.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/appointment_email_format.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_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 5584 bytes
SHA-256: 905b1a45353e74b42b3834796e024d4efac094aaea1acb9fac6bd6b22b98b354
font_01_sfnt_off000115df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DF 11004 bytes
SHA-256: 7a613310210768c0accbc184632b671e046a50c7dd3901625dfe28b93a87a2fc

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