Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d45b1271c6d231d…

MALICIOUS

PDF

82.7 KB Created: 2021-04-04 12:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 459b92fd7f279743d28c74a9acca9364 SHA-1: c07c374d05b72d0ad7b7e83188d3242d539e3970 SHA-256: 5d45b1271c6d231da598df4cb771c33a696cae0ef1dd91b4aa28ed829a91932a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=fire+and+ice+restaurant+bar+menu PDF link annotation
    • http://wanikagupefurav.22web.org/arithmetic_mean_and_geometric_mean.pdfIn PDF document text
    • http://skywonder.space/939890360596jqyi.pdfIn PDF document text
    • http://gbarb.me/dinobegisibeveyo42i.pdfIn PDF document text
    • http://hushseo.online/nuratujofufmt0m.pdfIn PDF document text
    • http://ejinaya.com/anne_rice_graphic_novelsnxs8d.pdfIn PDF document text
    • http://zarabatyivat.ru/cuento_las_vacas_de_quiviquintay3t4x.pdfIn PDF document text
    • http://salestore.pro/simcity_4_strategy_guide4ymlk.pdfIn PDF document text
    • http://kabomodom.iblogger.org/kobuzu.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/xatugekipujafujejonufav.pdfIn PDF document text
    • http://yachts-4-sale.com/94862638517sulpy.pdfIn PDF document text
    • http://burrrhey.tech/can_you_replace_ipod_5_batterythyjp.pdfIn PDF document text
    • http://copyrightviolationcenters.com/ms_word_compare_two_documents_side_by_side3vhlj.pdfIn PDF document text
    • http://bluhgang.best/warranty_claim_email_formatci210.pdfIn PDF document text
    • http://musc-media.xyz/how_to_blur_something_in_paint.netku8xa.pdfIn PDF document text
    • http://pojibuvuj.mygamesonline.org/ruxuxowagusajitamukeji.pdfIn PDF document text
    • http://daating19.site/how_long_do_you_cook_turkey_burgers_on_george_foreman_grillkv9gn.pdfIn PDF document text
    • http://znakomstva69.space/4904142510g4vuw.pdfIn PDF document text
    • http://lawyer-consult.ru/how_to_learn_english_grammar_in_malayalamko03z.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/how_to_program_overhead_garage_door_opener_model_2026q71ty.pdfIn PDF document text
    • http://autocredit.moscow/differences_between_excel_and_google_sheetsbeihg.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/english_language_course_in_urdu.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
    • http://kuxoxokazutuv.myartsonline.com/toshiba_satellite_l755_drivers_free_download.pdfIn PDF document text
    • http://jadukubilelib.myartsonline.com/ciaphas_cain_defender_of_the_imperium.pdfIn PDF document text
    • http://xesunuz.epizy.com/20576176618.pdfIn PDF document text
    • http://tikatogivuso.rf.gd/44458700170.pdfIn PDF document text
    • http://wogurep.epizy.com/solubility_chart_worksheet.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_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 4920 bytes
SHA-256: bfdf18a9d1089234311f4275eb2da2f7685ef839cfe26ac953c08682159d29b0
font_01_sfnt_off000108f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 11300 bytes
SHA-256: 0d9be2903f899ffd4a82e9c80c1b27452a47a5ee9e12f8b7ec8045ef263994b3
font_02_sfnt_off00012f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F26 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f