Malicious PDF — malware analysis report

Static analysis result for SHA-256 297c3d80de02be3f…

MALICIOUS

PDF

78.6 KB Created: 2021-03-09 13:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c1e4bf2c9b58c071a432f58868eb8153 SHA-1: 41d27bc79dfa930f9d7858b65e4bc2b5b82be8fe SHA-256: 297c3d80de02be3fec31c8dc42bebb147119d6d7100a47de4616962ce9c5fcf8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=nrma+car+market+value+guide PDF link annotation
    • http://shopyou.online/korean_alphabet_pronunciation_with_soundvenw6.pdfIn PDF document text
    • http://bottlechainworld.com/47124669399wjr1b.pdfIn PDF document text
    • http://prostochillforum.fun/vestigial_sideband_transmission_in_tv4u9a5.pdfIn PDF document text
    • http://slamelina.website/wegokizarupebav71r9.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/dyson_dc39_vacuum_head_not_spinning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_601faecfd5423.pdfIn PDF document text
    • http://m-ryanaf.site/6559356543plakc.pdfIn PDF document text
    • http://reduslim-official.website/digimon_lost_evolution_translationhugpl.pdfIn PDF document text
    • http://fruit-citrus.space/kazagapuvemqrmus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5ff59b9b188d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_602f8899ed8e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_600166da44920.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/saswara_veda_mantras_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fee4aedc8167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478952/normal_5fcdc2e5e9788.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/70172664263.pdfIn PDF document text
    • http://desokore.medianewsonline.com/ruzikazefekawox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467300/normal_5ff931b0492f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446634/normal_5fec928fcf7cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fatafebegit.epizy.com/31650107915.pdfIn PDF document text
    • http://mizebowofaz.epizy.com/91125384028.pdfIn PDF document text
    • http://zolasot.rf.gd/how_to_get_a_planet_fitness_guest_pass.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_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 5172 bytes
SHA-256: 4e7bf4bcb16eba7e3ddb27464d4a5d9cc25b055768227d98818ec2c5625bff2e
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 10732 bytes
SHA-256: eec6ad43bec20018b4a28a10c737bd9bdd89065dc94c872b81e4f2a7ed9a38a0

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