Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d0e1ff04088d5e…

MALICIOUS

PDF

73.9 KB Created: 2021-03-18 20:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: afe4436004e1e92a7253859366bbb49c SHA-1: 8de4fef1eee98e7a3156e31ea54bee3e0e6702ad SHA-256: 51d0e1ff04088d5e7337a3fe383d375fc16e4f5a4e3e8d2d1479acaa34333ca3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of external links, many pointing to disposable domains, which is characteristic of a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://botokaw.ru/award?keyword=asakuki+diffuser+manual+pdf PDF link annotation
    • http://mynasert.online/what_is_a_hyperbole_poem_examplesu6szr.pdfIn PDF document text
    • http://power-guard.shop/91425725773m7dg0.pdfIn PDF document text
    • http://sait-ok.ru/8647170162oodht.pdfIn PDF document text
    • http://theplafond.xyz/samsung_hw-hm45c_reviewsh95m.pdfIn PDF document text
    • http://x-bionic.shop/38838526201q1l1x.pdfIn PDF document text
    • http://mandarin-fruit.space/power_outage_report_duke_energyrmxtm.pdfIn PDF document text
    • http://coloradocustomelectric.com/paserosurutapuxorumow2s9ui.pdfIn PDF document text
    • http://detonic-buy.website/996933136363qgjx.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/what_is_a_caldera_eruption.pdfIn PDF document text
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/f9a6e9aba.pdfIn PDF document text
    • http://abreudesigns.com/10697460704d2du8.pdfIn PDF document text
    • http://spainwow.pro/jufulorekaluvepexebifbbz9.pdfIn PDF document text
    • http://smartcreditus.info/southwest_airlines_visa_travel_insurance4vt1o.pdfIn PDF document text
    • http://beamorem.com/49144022395nv9d8.pdfIn PDF document text
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/876931.pdfIn PDF document text
    • https://tefitosuwit.weebly.com/uploads/1/3/4/4/134478986/xatow.pdfIn PDF document text
    • https://lolimoxozidexus.weebly.com/uploads/1/3/2/6/132682882/xaxabifalesif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_fb57fb02b2544344b39c928672f0e2e0.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_89b4e8deca5a4e3390912f57b1d49120.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_18bea6a7fd8f4f5fa9073b196627d424.pdf?index=trueIn PDF document text
    • http://bexukavibume.myartsonline.com/arya_samaj_vedas.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_24eecbe1513e4b1094117b40790ee045.pdf?index=trueIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_de61c390211a401cbfdf5aa05e35521e.pdf?index=trueIn 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_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 5240 bytes
SHA-256: a19d4122837124f988fc476e10f8233dc4e2a4a634aff6eeb6055d3887210108
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 10868 bytes
SHA-256: 6919831ceba0fdb8c756dd88029f0de11d65e206f3263edbcb28eb91be9602c6