Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ff1b846abd9312…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 09:11:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b4ab4d38544896f1ec112593c67ecd7a SHA-1: 190758683b9c92554626facd5977f0b8fb8cfa89 SHA-256: a7ff1b846abd9312c2566a29285dca551b9d454c3ece761c13aff02c862c4390
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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/award?keyword=instrumentation+and+control+textbook+pdf PDF link annotation
    • https://cdn.sqhk.co/zulatobi/KvifEgj/rejoditaduvej.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/57929153527.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/ssc_stenographer_exam_paper_2020.pdfIn PDF document text
    • http://llloooodddd.space/894170970233h8fd.pdfIn PDF document text
    • http://luchdobro.site/283351275279zlas.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/jOhgggw/60291652932.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/haVZjae/farming_simulator_14_game_download_free.pdfIn PDF document text
    • http://gozimudowojuzun.mypressonline.com/xoweluxov.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/ijficlA/49574956054.pdfIn PDF document text
    • http://clientbluebadge.com/robux_to_usd_convertervc3ja.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/dyhbquM/xofixurola.pdfIn PDF document text
    • http://coins24h.com/22292460746xzir2.pdfIn PDF document text
    • http://sfhgfje5df.xyz/vidya_ganapathi_stotram_in_telugumi5ye.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_f54cdab9ca114417af985b1c1a1cb045.pdf?index=trueIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_4303ba550ac44d098fbb7a60877e3220.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/gone_with_the_wind_movie_museum_marietta.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/sivalulusaxekabuwewi.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/humanoid_robot_report.pdfIn PDF document text
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_0e38e0eeadbc40f2977ccf0d460606d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/arabic_sad_instrumental_music_free.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/95524690490.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/9357297307.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_aab126eef9b743d3a704440d91fe3b29.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/arteria_iliaca_interna_y_sus_ramas.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_fdb51d4ec59d4fe795fbd02713c41b7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/pimum.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/cadillac_xt5_2019_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 5392 bytes
SHA-256: b55e9e58a26908ef58c722ff74327d5c2227fb5e4074276cd7701245f1d152ea
font_01_sfnt_off000108e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E7 11268 bytes
SHA-256: 72d91bdd4c3ab2d7847b072ce42362c1ab6f85b8550965271721696129cc1b60
font_02_sfnt_off00012ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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