Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2e73ce8f26815d…

MALICIOUS

PDF

79.8 KB Created: 2021-06-06 22:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eedbb4d6a5c118410982cb7ef1405d6c SHA-1: bb417fb4f66cc3feed3e74a189b308175df05d78 SHA-256: 7e2e73ce8f26815db53b8f8fdf93a2dda41c89da743fe25e4127febbf06346cd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://nipisod.ru/123?utm_term=boris+the+animal+true+form PDF link annotation
    • https://wojatobarub.weebly.com/uploads/1/3/4/6/134612389/6c7c5e215e.pdfIn PDF document text
    • https://jaligudupu.weebly.com/uploads/1/3/5/3/135391073/dajeguxenibapop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_603dbabbadb3e.pdfIn PDF document text
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/1299529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_60129e96163bd.pdfIn PDF document text
    • https://tofeniva.weebly.com/uploads/1/3/4/6/134625175/0e89447b60303f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483839/normal_605f7825ade94.pdfIn PDF document text
    • https://bisuduroj.weebly.com/uploads/1/3/4/7/134714880/18bad.pdfIn PDF document text
    • https://dasatupulike.weebly.com/uploads/1/3/4/1/134131314/duraxiwajapiz-dazobu-bovubiga-nomirovixad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5ffac95a30a8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144455223/65444003439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/658cf171-4b42-41d3-8a9a-a1ebab2c701f/learn_quantum_touch_techniques.pdfIn PDF document text
    • http://kekivozafiko.pbworks.com/f/98136873726.pdfIn PDF document text
    • http://xibosini.pbworks.com/w/file/fetch/144705669/problemas_de_aplicacion_de_tringulos_rectngulos_resueltos.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144623232/vuescan_serial_number_free.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144427797/sky_high_2_tamil_dubbed_movie_download_single_part.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c4a676-bed2-4365-b92e-467271223ace/how_to_sync_2_jbl_flip_4_speakers.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/hard_boiled_detective_fiction_definition.pdfIn PDF document text
    • http://goxeguj.pbworks.com/w/file/fetch/144644256/nozuzawavuvirum.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_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 5056 bytes
SHA-256: 3d248726c6d92c41f1a8f5779bcfd9b1d66bb4da836fef54bd73c385a14dabc6
font_01_sfnt_off000109c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 12036 bytes
SHA-256: 3d793610558d54885b664e55ac238c636f6a002565932a3142d5b1456025d44e

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