Malicious PDF — malware analysis report

Static analysis result for SHA-256 be089c4c68e6b5ce…

MALICIOUS

PDF

84.1 KB Created: 2021-03-20 21:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 58c2554d765ec172a231639a04828b1b SHA-1: cc015e00aa97da3ffb8f357bf4318116261761e8 SHA-256: be089c4c68e6b5ce6602819ec5349cb8ee68135edc8262b39c66df84873ebdd4
126 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://pelibifir.ru/strik?utm_term=reloading+press+mount PDF link annotation
    • http://tehnopolis.org/samsung_galaxy_tab_p3113pixl3.pdfIn PDF document text
    • http://f13x.xyz/xepamuksn6q.pdfIn PDF document text
    • http://vapabamulu.22web.org/fuvebusev.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/seoul_metro_map_english.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/what_are_habits_of_mind.pdfIn PDF document text
    • http://desokore.medianewsonline.com/the_living_bible_catholic_large_print_edition.pdfIn PDF document text
    • http://bezprovodov.guru/sonic_drive_in_specials_after_8pmz7ctb.pdfIn PDF document text
    • http://topvideo.design/39893950138oq4wv.pdfIn PDF document text
    • http://jixuvofariva.iblogger.org/south_park_the_stick_of_truth.pdfIn PDF document text
    • http://soluzixod.66ghz.com/gilroy_atlas_of_anatomy.pdfIn PDF document text
    • http://storezone.info/tefutunejidukadowanh4bqc.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/what_does_the_2nd_amendment_mean_by_well_regulated_militia.pdfIn PDF document text
    • http://lnstagramsupportlives.com/12577862135ka5fr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajavuminona.atwebpages.com/55390886991.pdfIn PDF document text
    • http://gepivefukusi.atwebpages.com/pefapujanibexezumuxujusip.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/burgh_island_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/cuales_son_los_derechos_humanos_laborales.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/van_helsing_tv_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/la_la_land_music_from_the_motion_picture_soundtrack.pdfIn PDF document text
    • http://mivajodeki.epizy.com/how_long_to_bake_sweet_potatoes_at_400_in_foil.pdfIn PDF document text
    • http://xemusiginusepiz.rf.gd/bexotosobexomepukixo.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/62075961126.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/administrao_cientifica_e_teoria_classica.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_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 5288 bytes
SHA-256: 980c6ab72ae8ec2e575b33e3952b11fcbf80d068985b619a0e3ad53f64c8454c
font_01_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 12000 bytes
SHA-256: 58190e118ea705a64078a2498d8fc1cab56296360956fa8c058e3b59e58bff4b

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