Malicious PDF — malware analysis report

Static analysis result for SHA-256 419d520f6d72502e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-07 05:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0005631bc18e2dcc0052d6a128880675 SHA-1: 2d8477c9154b803902465ec6110d4ae2545c3724 SHA-256: 419d520f6d72502eef7cdb1edf9d16eb072db7d799076b9fd239addbd7447ae9
186 Risk Score

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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=kodak+easyshare+z981+software PDF link annotation
    • https://bazuditok.weebly.com/uploads/1/3/4/5/134590154/ad74800c2f92d5.pdfIn PDF document text
    • https://tedevonefuses.weebly.com/uploads/1/3/4/5/134528644/75b199a139d46b.pdfIn PDF document text
    • http://sellamorem.com/service_engine_soon_light_went_off_by_itselflyife.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/luzoloruvigadab.pdfIn PDF document text
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/a7fffa8fe.pdfIn PDF document text
    • https://pekudexuvu.weebly.com/uploads/1/3/1/4/131437333/7102248.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/lubilivuparavat.pdfIn PDF document text
    • http://mon-cmbretagne.com/naritisue1xw.pdfIn PDF document text
    • https://rilavopitokutod.weebly.com/uploads/1/3/4/7/134765049/790863.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/ramula.pdfIn PDF document text
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/dalesotizimukob_perudumevozak_severuwoj_vitemij.pdfIn PDF document text
    • http://microdigitalmeter.xyz/how_to_write_a_short_descriptive_story4k359.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/82224194036.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_2c9acc01983c4e37bd44cc6af1db15f4.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_22d4864e960f4e4eb9b723ee71d34d4a.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_f8bf08cdbff8412a826f3cc70a69adc9.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_dc5ce137f37c47e4a3643103aff9262b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pisedij/14706803300.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/aaranya_kaandam_theme_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/rivabumijejemaj.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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 5640 bytes
SHA-256: 1ae7e1ee37cc509f2d5fb798823b4e846c5c4727ab59fe973935b27abd760c6a
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 12508 bytes
SHA-256: dcbc6e40959bc7c154fe80a7063c67a291a8e4016f9141b7e28d23d9c4b3fc67

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