Malicious PDF — malware analysis report

Static analysis result for SHA-256 5feaaa4c7a26b000…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 16:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b7a2930a6c89bd713b0dfc9956549bd SHA-1: e79bf1d023ae664859cb86e26ade40ce482d3354 SHA-256: 5feaaa4c7a26b000e03f388fd481695b7cc23fe3ac80f9dcedc70bc94549b275
156 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 0.9998

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 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.
  • 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://kuzutuzo.ru/award?keyword=second+industrial+revolution+summary+pdf PDF link annotation
    • https://dawijenumekoxel.weebly.com/uploads/1/3/6/0/136087820/9747671.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/df71c.pdfIn PDF document text
    • http://bupitubegedew.getenjoyment.net/37732135582.pdfIn PDF document text
    • http://kumorafeg.iblogger.org/gijup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozetej/wovavenajefor.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/fedikivezo.pdfIn PDF document text
    • http://zovixiluru.epizy.com/contabilidad_de_costos_un_enfoque_gerencial_12_edicion_solucionario.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_7951fed5345e4f34a8377fa4101d2c53.pdf?index=trueIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/bangalore_cdp_map.pdfIn PDF document text
    • http://xikisefux.epizy.com/wufejekujodap.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/flora_bacteriana_normal_intestinal.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/difference_between_fiction_and_nonfiction_worksheet_ks1.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_11a18fdf1a994078b05e554635acf0a8.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_922b635103f942c7a89054a41369c830.pdf?index=trueIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_ed401fa03c6645a2872a6770acc89139.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_4369b5ee8e344bafa09a90e6dfd7254f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/pibafidar.pdfIn PDF document text
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_de1253b5a66748faaa92fd2d094fd267.pdf?index=trueIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_e2f1b41514ab48ffaacf90b10869a3b5.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_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 5564 bytes
SHA-256: 31a577030036418120390c1c1540c940ed80a7bc5088a7c81a5c910705c3c069
font_01_sfnt_off00010011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 10372 bytes
SHA-256: 84521f459a83225e2f9d39671f2edd348d33dea0431e87bf6abab397af58cea1

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