Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea3c1ff7c3c037d…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 22:00:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 50b9db600ce67ad7f83876934ec8a6f3 SHA-1: 2b9b8cfe9190a632f6d8aa390097cfd2c205e54e SHA-256: cea3c1ff7c3c037df4b683392b3754026f5c9f170af96a9dd1f8b89d1e0187c8
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 0.9996

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 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://fokemale.ru/wix?keyword=five+pros+and+cons+of+selective+breeding PDF link annotation
    • http://itclick.info/aircraft_maintenance_engineer_course_in_malaysiaadrjp.pdfIn PDF document text
    • http://pycnidwzxc.info/johnson_outboard_owners_manualgvrth.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/wudeseminumalu.pdfIn PDF document text
    • https://wikejawuwe.weebly.com/uploads/1/3/1/4/131437941/ecdd25b94.pdfIn PDF document text
    • https://lejegibovijidup.weebly.com/uploads/1/3/1/4/131438293/37abba5bb72.pdfIn PDF document text
    • http://gta-msk.ru/que_es_la_conducta_refleja_en_psicologiaidd5e.pdfIn PDF document text
    • http://winfreeiphone.xyz/xudowamufebifi0gg2t.pdfIn PDF document text
    • https://fevawitag.weebly.com/uploads/1/3/2/6/132695646/wilowovox.pdfIn PDF document text
    • http://herss.space/682567283519r0y8.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/7286499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_8637955918574915ab91565c960a7c99.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_a8b0bab735cc43038198d194f7542e8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/bheema_telugu_songs_ringtones_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/livuxodeke.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_9f9235c66c29405d83e141ec00aa1023.pdf?index=trueIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_988e41e52a9545c8b92ecd1b09e639a9.pdf?index=trueIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_adefd51ce8794169941749ef10cfbbe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/output_voltage_transformer_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/napebutarumajebosimo.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/91052722866.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/brother_dcp_l2520d_full_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/best_bollywood_movie_2018.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_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 5476 bytes
SHA-256: 5e70aafbadaa00ac1f2071ddd69c63dfc1ab55a8e74e834bcbd520bf534bab9b
font_01_sfnt_off00010fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCA 10196 bytes
SHA-256: c8be862c889e0884b33ea234b58331da4acea31daf86e7b8acf764a46ade8711

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