Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a0b8c471d89a9f…

MALICIOUS

PDF

79.1 KB Created: 2021-03-15 14:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7886403db348fec6fe2fb57c33baedb2 SHA-1: 3845938ec2cb55cf2eb7dc3364e8c72e66a1d656 SHA-256: b7a0b8c471d89a9f1cc20c5a4e4bf7715d4c4b6419a5e0eb3e7a3f43013f87c3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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://bologen.ru/award?keyword=bihar+map+pdf PDF link annotation
    • http://xifasiv.getenjoyment.net/lofurugaribasutiwadom.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/OuidzJ7/worms_vs_snakes_meme_version_io_2_unblocked.pdfIn PDF document text
    • http://homebig.space/tales_from_the_time_loop_free_downloadq18v8.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/31521409062.pdfIn PDF document text
    • http://mesretly.xyz/jopawitoxt5dg0.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/arabic_words_and_meaning_in_english.pdfIn PDF document text
    • http://uber-global.com/lideromopesujozezslb.pdfIn PDF document text
    • http://xoxinusenavi.66ghz.com/bifuxut.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/GjjHpje/aranthangi_weather_report_today.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/how_to_get_a_fine_dining_server_job.pdfIn PDF document text
    • http://todiluz.22web.org/how_do_you_get_a_job_at_salvation_army.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/ifjbjdV/87844132298.pdfIn PDF document text
    • http://mamajan.space/bajujoketuvenepunujosumukom8v1.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/gdUZwhd/hot_wheels_ultimate_garage_instructions_shark.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/h9SDTZ4/56157605378.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/88310689941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibimom.myartsonline.com/boundaries_in_marriage.pdfIn PDF document text
    • http://segixiw.epizy.com/linus_and_lucy_piano_free_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/beluvuna.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/76145867522.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/wagner_w16_wallpaper_steamer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/jovodewasaf.pdfIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/nicomachean_ethics_sachs.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_off0000f756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF756 5120 bytes
SHA-256: 9718c13f16ac5ab67bf8385e1eff251a458fafd30481389f51382383f9a278c4
font_01_sfnt_off00010899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10899 10908 bytes
SHA-256: 7e0b3f1888a4368b33dab631b699516acacb56322b7b36717973778f94272cdf

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