Malicious PDF — malware analysis report

Static analysis result for SHA-256 6555f5501f3a8f68…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 06:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 43510ac8b1a5ac65152e5b4ef195bca2 SHA-1: e9656fd203a3ca59ae1f1f945a700e90d1effd72 SHA-256: 6555f5501f3a8f68cb21336d9377e530066efaec40d40d699c03119d5f16387d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. ClamAV detection and ML classification strongly indicate maliciousness, specifically flagging it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt, likely using the document content as a lure.

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://xezojetit.ru/strik?utm_term=information+systems+today+managing+in+the+digital+world+7th+edition PDF link annotation
    • http://vamoktin.ru/maths_tables_1_to_30_free_downloadzxphv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5ff2c746ed96a.pdfIn PDF document text
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/xolil-nevasasobubomif-ziwelerozejujof-vovatikuxivun.pdfIn PDF document text
    • http://prod-fruit.space/fulatijovigafinazwdhu.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/xagiveguwekili.pdfIn PDF document text
    • http://getyourscore.info/gesasabigf410l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5feb72c94d70d.pdfIn PDF document text
    • http://japancar-sib.ru/bloons_td_battles_66bgf8.pdfIn PDF document text
    • https://putajomarope.weebly.com/uploads/1/3/1/4/131437676/zagarixukiziz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413702/normal_601eea4283002.pdfIn PDF document text
    • https://pafirolexorawu.weebly.com/uploads/1/3/4/6/134612045/7665600.pdfIn PDF document text
    • http://stroymarketmetal.ru/580534613885fcv9.pdfIn PDF document text
    • http://reduslimitaly-official.site/78637089649zytud.pdfIn PDF document text
    • http://zesamoa.online/batetafipejajojizawubesuy8rxf.pdfIn PDF document text
    • http://nuverlites.online/does_utah_look_at_weighted_gpacep7d.pdfIn PDF document text
    • https://deponoma.weebly.com/uploads/1/3/2/6/132696267/2837039.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/kugelilizibuwum/gotti_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/bleacher_report_nfl_week_16_score_predictions.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/tukopinudalopalodi.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/ninja_foodi_blender_target.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/46700619581.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/factorization_worksheets_for_grade_4.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_off0000f09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09B 5532 bytes
SHA-256: b0a989ef0d9cf27412cac5576bdb9020577ad7fb0a6ff822aa3aca5e31d0fd54
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 11768 bytes
SHA-256: 9747da743aed0a0a91a67f608343681422210793a2ca6e396a53ed4ccdea393c

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