Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fa8711adccefef…

MALICIOUS

PDF

83.4 KB Created: 2021-04-08 19:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 48e992d0aef4a933afbb33c2af97e48d SHA-1: 7fd1d2d40ac950d118baa89488a6afa4d2266e0b SHA-256: e6fa8711adccefef893e7428034fcad54e3a476f60402c741d792ebd3ec705f5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with link farms and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The primary URL, 'https://midufefew.ru/strik?utm_term=dr+brown+microwave+sterilizer+bags', suggests a lure to a malicious site disguised as a product search result. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://midufefew.ru/strik?utm_term=dr+brown+microwave+sterilizer+bags PDF link annotation
    • https://cdn.sqhk.co/xesagomi/3heQ8Yj/14464930611.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jihijaE/learning_to_speak_english_online_free_lesson.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/ojhmegj/sql_server_management_studio_2008_format_query.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/Mggq1je/lojaja.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/jgijeii/xcom_enemy_unknown_dos_version_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/sgdt7hi/guess_method_differential_equations.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/UBAeEVQ/juventus_schedule_tv_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/giifijM/zekigojemojire.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/D4bFFjg/91083254071.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/hNbghjh/derwent_inktense_pencils_36_pack.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/3060445.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/0n0mgec/zalufenikekatadibebow.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/ZXkjfhd/biwixunaki.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/6295400.pdfIn PDF document text
    • https://cdn.sqhk.co/jibibezeva/CjcjIbX/brutal_death_metal_internet_radio.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/gdbl755/zusovunivuv.pdfIn PDF document text
    • https://cdn.sqhk.co/ramowejub/jbVOSha/43017155566.pdfIn PDF document text
    • https://wuvesemoni.weebly.com/uploads/1/3/4/3/134335409/bonigemon_jiterenajokega_pevagatodose_bobuwotazumofe.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/gcifKus/formative_assessment_physical_education_examples.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/182e6f3.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/dhehi8U/ordinary_people_lyrics_blake_rose.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/vonusirukete/gavajeg.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/how_to_reset_a_whirlpool_accubake_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/pekirazisijikepalakameki.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/artificial_neural_network_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/aisi_4130_mechanical_properties.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 5460 bytes
SHA-256: e91704059771bc5484f38d976140220687aaae77a4f04abe7bddcea6ad1bd1e9
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 11904 bytes
SHA-256: 807c5415b377f404a4c29f1f74202320813c36cdba58016ab7090f6fa2f9b329
font_02_sfnt_off00012ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90