Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db7434c1b875063…

MALICIOUS

PDF

92.5 KB Created: 2021-03-22 07:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 543d3a53f02e07adfb9bc1fddb0ddc88 SHA-1: d97205f370de46087205d18f4c0e31a350536b0c SHA-256: 5db7434c1b8750633539a438dfda4db7ee5a66695bcdbfcdd454b4d5f15d5ee8
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 embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=sling+tv+apk+mod PDF link annotation
    • http://arfesopt.com/indoor_motocross_tracks_near_mehk07p.pdfIn PDF document text
    • http://apsdd54gfv.xyz/luxizivujibtr1aa.pdfIn PDF document text
    • http://evromotors.net/is_the_sun_still_boycotted_in_liverpoolptqkc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_6011865623a71.pdfIn PDF document text
    • http://amaryllis.space/lapixuzrb9di.pdfIn PDF document text
    • http://torchland.xyz/319754391988tc0z.pdfIn PDF document text
    • http://shoop-ff.ru/10_enunciados_admirativosj9n7y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fdda63addf71.pdfIn PDF document text
    • http://7evenrp.ru/ong_orality_and_literacyuxl7t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_5fe7f3ea319e8.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/recoleccion_de_datos_investigacion_cualitativayjmvh.pdfIn PDF document text
    • http://freshka.fun/lateral_thinking_meaning_in_punjabi2tbfs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_603b2b7f38cf0.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/d665e197-bd3d-49f4-a781-480d2b28f64f/5971275331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fee4953-3a02-49c1-a85d-88fef9ddb821/dell_poweredge_2950_iii_hyperthreading.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_784315213ff64bd69d2096524967d92d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/38881426008.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_be75adcc45a0402f85e4d4e7f168cfe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/el_conde_lucanor_adaptacion_vicens_vives.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/colour_smoke_png_for_picsart.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB4 5232 bytes
SHA-256: 1d16da77c396e72486355aa741dc9a0e41613584eab3351bf83d7c6f9d336312
font_01_sfnt_off00013c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7F 12308 bytes
SHA-256: db1726f9f66eaf6527adad4ea45039610affcd50475db7e416fa160aefa48877

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