Malicious PDF — malware analysis report

Static analysis result for SHA-256 a148da030871b998…

MALICIOUS

PDF

76.2 KB Created: 2021-04-13 16:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d10de3a393143f73cba618db18c008df SHA-1: 78edcb5a8ae10de04e7a5af856dae2dbb5ab6988 SHA-256: a148da030871b9981c3acc8d31a65e76e61f3f72b52095266ea5bda80854afbe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URL `https://baarspo.ru/strik?utm_term=throne+of+fire+full+movie` suggests a lure to download a movie, which is a common tactic for distributing malware or conducting phishing. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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=throne+of+fire+full+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fcef0d7b854b.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/the_open_window_characters_vera.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/x6MMiic/73115653144.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/medios_de_comunicacion_salvadoreos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fd696969e94a.pdfIn PDF document text
    • http://bimadepunepi.mypressonline.com/53206850834.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/jj0VVig/history_of_south_african_mask.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/m0Uihj3/luwexa.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/dedosezeku.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/63880494027.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444117/normal_60095c81e1cfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5febc2162921e.pdfIn PDF document text
    • http://nawitebexu.medianewsonline.com/causes_of_diabetic_ketoacidosis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9542af9a-176c-4898-b9c1-d02d38d3766b/visual_identity_system_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/vadizaxezulupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a5045f7-7c61-4aba-b6de-af342ed4773d/most_important_events_in_spains_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4637d8e4-5c2e-4359-a674-7e1ff1dce0e4/65557353641.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/what_time_does_sims_4_update_come_out.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/44428806040.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/48132525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401fcd30-c8cf-4aa4-8171-619b4d19e9fe/sizunabokamowafat.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_off0000ee6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 4628 bytes
SHA-256: a05c1d1bff36ea4e00a2b6d063571bb5d5eeed092770e52f429616fd29597d5d
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 10520 bytes
SHA-256: 1bbd28f089a847075090eeb52225095cda81ee690a68c5a050ede9b7b1c71a4a

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