Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6893bf044ab806a…

MALICIOUS

PDF

86.3 KB Created: 2021-05-11 13:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 200ddd8ac3ed4178c66750bd612c81a4 SHA-1: a4294084dfb073e0e6ccb5d3e4294d0f6c6ecef5 SHA-256: b6893bf044ab806a0d599ee212b19e069a3d644c51157eaac1f8b9368642c7a5
134 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed for SEO manipulation and hosts disposable links on untrusted domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/strik?utm_term=r+p+rethaliya+books+pdf+free+download PDF link annotation
    • http://tibagisuminove.sportsontheweb.net/61221481929.pdfIn PDF document text
    • http://alcexpress3.xyz/amazon_prime_music_90_day_trialxxycp.pdfIn PDF document text
    • http://pikufufunuti.scienceontheweb.net/zefemibobil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_60321396bed02.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/tokafokupamifiwivifur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_606d010edfb7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6020860d99200.pdfIn PDF document text
    • http://fivadoguna.medianewsonline.com/braun_series_7_790cc_manual.pdfIn PDF document text
    • http://glawerry.online/imd_world_competitiveness_report_2018l0m2t.pdfIn PDF document text
    • http://salonop.xyz/earthwise_lawn_mower_partsml7yv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_5fda95c31c5db.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/bee54a42-e6c0-4746-9d4e-921dd7accf8a/59974484208.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/butudixibemufiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3ccb3b-e032-40d4-89c2-68d3b739e83a/81217494005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab39441f-6932-4133-bea1-0ca9cbbac7e2/irritrol_rd-600_manual.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/10254325033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5788798f-12c1-4618-8cf6-5835d8a28f0c/teatro_en_casa_5.1_canales_rca_rt2781be_200_watts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0eb0b65-7821-4716-9428-30ca2f651d69/54011213558.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/study_iq_current_affairs_in_english.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_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 5536 bytes
SHA-256: 0b0b898b13fa1e2410bcf6b8f95cc94cf1ccfc91531bf84f790d0e374dd7b3c4
font_01_sfnt_off0001229d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 11784 bytes
SHA-256: 8096d486f61717e71f70ad7b85a6e24ab5f98d4ddc6b99fb2205359a70088c90

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