Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c732e6576c9883…

MALICIOUS

PDF

82.1 KB Created: 2021-03-09 16:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a1aecf51f3e7493c6778df4d4086acfa SHA-1: 94d16de092fd1262e66661c429d4aa31032fa45b SHA-256: 56c732e6576c98830c08a7c10524905d09a319cee9f5e04af46f0abe42ea3971
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=start+where+you+are+pema+chodron+summary PDF link annotation
    • http://rutopadazemed.22web.org/how_to_know_what_ram_is_compatible_with_my_motherboard.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/Qfih8jf/97880632918.pdfIn PDF document text
    • http://nodozavi.iblogger.org/big_short_netflix_country.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/jesus_calling_book_barnes_and_noble.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_6006fd4429cd7.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/bose_acoustimass_10_iv_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dabigewom/Lajaxij/cartoon_wars_blade_hack.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/information_technology_degree_online_reddit.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/the_yearling_1994_trailer.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/pugejafetifafepevugebuzov.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/gehijgh/tunozobuguvuweduluze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_5fd9d9966c17e.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/jodulejemabelojarisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451930/normal_5fcababab602c.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/74412429406.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/hajfhbR/tamil_hd_movies_free_download_website_list.pdfIn PDF document text
    • http://gasomenuza.iblogger.org/bony_mwaitege_utanitambuaje_video.pdfIn PDF document text
    • http://kopawaruda.22web.org/textsheet_for_course_hero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wogavevowef.rf.gd/zujifow.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/logo_quiz_world_answers_level_2.pdfIn PDF document text
    • http://lexafuz.epizy.com/77164081612.pdfIn PDF document text
    • http://pijularof.epizy.com/suzajadolarurowenapa.pdfIn PDF document text
    • http://rivejekab.epizy.com/99090584148.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 6548 bytes
SHA-256: b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7
font_01_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 5580 bytes
SHA-256: d960c9087cefed8c9cda6e12feca2a4712ad2b33ca15b41d0770a623c1e7ead9
font_02_sfnt_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 10440 bytes
SHA-256: f3f6658ba6a23ec548592a957e8c27e36fccb5b5628e99700ac11c6247de152f

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