Malicious PDF — malware analysis report

Static analysis result for SHA-256 8897c240cd0270bc…

MALICIOUS

PDF

149.7 KB Created: 2021-06-04 08:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2b1555412dfaea7f37b85b005031f4a SHA-1: 2137dd779e65e4127f4c41a720f3d0f86bc00c7d SHA-256: 8897c240cd0270bcf34b69888cbcc2716bec1e8f5e4f561c5221c2eacf8ea5da
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 links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

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://oniceh.ru/pbw?utm_term=umberto+eco+historia+de+la+fealdad+resumen PDF link annotation
    • https://fapusogemewesil.weebly.com/uploads/1/3/2/3/132302858/tosofijewij-xuburugotexigod-tafaxazu-jarululivuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60151e2843a8e.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/tivag_jeguf_sirix_vowejime.pdfIn PDF document text
    • https://gasibikame.weebly.com/uploads/1/3/2/8/132814219/tolobupif.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/4394288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_602598e308aba.pdfIn PDF document text
    • https://takaweso.weebly.com/uploads/1/3/2/3/132302848/1403757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_6068c0e99d2df.pdfIn PDF document text
    • https://kojiwoxoposegig.weebly.com/uploads/1/3/4/1/134108885/4722750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_5fd696f046279.pdfIn PDF document text
    • https://burusezal.weebly.com/uploads/1/3/5/3/135306482/95c4968059.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/4970402.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458148/normal_5fec2ceb43dae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467017/normal_5fe044af9f9b4.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/kadok-wokagatoxetaf-wololagusolepur-navapetugez.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/0f4939de-a35e-4e3e-9eeb-cb6114211921/78959676682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456d6516-bf5a-456e-9e08-04d2775ce45b/does_the_nikon_d40x_take_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa96dd1b-2ddc-4917-8bfa-91c0c2db7243/satomigetumoribimulabin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774f9d01-f0e4-4073-aba9-c5957757b667/bissell_power_steamer_power_brush_belt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e97f0f9-bd4b-4806-8b2c-d86d6be33047/5041005173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb38d6a-3283-444f-9611-8559252e5cba/mopureloxanewutonowoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f5f979-0269-4d28-9d30-497dc89b4083/christmas_white_lights_string_light.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_off00020933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20933 5392 bytes
SHA-256: 141fda1214fe295e4269469c7bb570778341eb609a3dac61e0745ef726a202bd
font_01_sfnt_off00021b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B5C 14232 bytes
SHA-256: 229c481b33609adad4f8a189877f4dcf32dd2cec57f81eaee70ab099e0a7d37d

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