Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b5e0979153f711…

MALICIOUS

PDF

94.7 KB Created: 2021-03-23 04:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ca57a43a9e90f27ebf603da8b8e5a3a4 SHA-1: eb9a7272ccaa1992aeec80e030d9ca7140f2083d SHA-256: 64b5e0979153f7114278b2083b1ff14964af071fd2af017ed2fe7260bab4232e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm designed to obscure malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to potentially malicious or benign PDFs, but the overall structure and heuristic firings suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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://pelibifir.ru/award?keyword=pmay+application+form+pdf PDF link annotation
    • https://cdn.sqhk.co/goworonol/UXibygc/mouse_exercise_wheel_with_counter.pdfIn PDF document text
    • https://cdn.sqhk.co/doxutijewu/bEhbiaw/20944380960.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/72392620668.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/kiar5vl/boomerang_full_album_mp3_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/ghcCRhh/weed_wacker_electric.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/dD8eQno/into_mirror_mod_apk_revdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/vetojokivadoxik.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/davutama.pdfIn PDF document text
    • http://miweduxaso.rf.gd/introduction_to_autonomous_mobile_robots_siegwart.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/kajokoganetumigedazixos.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/13654950204.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/zatafab.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/casca_julius_caesar_character_traits.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/kobozolefutaju.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_60131692e89f4f92952060219f71f670.pdf?index=trueIn PDF document text
    • http://vivazuriperulus.epizy.com/how_to_add_days_to_a_date_in_excel_excluding_sundays.pdfIn PDF document text
    • http://xajetizefo.rf.gd/duniros.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/apple_headphones_adapter_for_android.pdfIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_eeb79ea1b7f54dfc8cd83e12c01f74d8.pdf?index=trueIn PDF document text
    • http://disoluje.myartsonline.com/english_grammar_printable_worksheets_for_grade_8.pdfIn PDF document text
    • http://viropamel.rf.gd/69816262042.pdfIn PDF document text
    • http://fiwujugisijema.epizy.com/hollywood_animal_movie_in_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/avery_dennison_supreme_wrapping_film_datasheet.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_44b59573d3f64eec846567a172f8446a.pdf?index=trueIn PDF document text
    • http://jabodegodonirad.atwebpages.com/nism_technical_analysis_book.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/icd_9_code_for_urinary_tract_infection_unspecified.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_8a2b046c3ca947a28f670cd745f7f585.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/ray_bradbury_cause_of_death.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_off000116fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FB 5224 bytes
SHA-256: 8620cd857f6868428818fd7f881d77c9d0d3416627c2ad80004e2d580364a7d8
font_01_sfnt_off000128b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 11356 bytes
SHA-256: 3654689f8a238b745d8f561950551cd2c61e5abcdeccf981f248af09728001b9
font_02_sfnt_off00014fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBA 8964 bytes
SHA-256: 61f847276b8f809a734c14a3e1aea2e374ad4ca968b7ea79ea7f07fb6edddb7d