Malicious PDF — malware analysis report

Static analysis result for SHA-256 376635abf516d785…

MALICIOUS

PDF

71.0 KB Created: 2021-04-25 04:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: afb7f8238187a5f33e9ef911de5d19c5 SHA-1: 9c34b843f5390aeaf1967775b16de4ed9a0a6398 SHA-256: 376635abf516d78589f81d81994555fc32a1b72a725728a8840ec8324f23ef35
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 0.9996

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://jottigo.ru/strik?utm_term=how+to+learn+phrasal+verbs+quora PDF link annotation
    • http://kixorita.22web.org/centos_6_live_cd_iso.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/ledafewinaduxarafalisiletkgqz.pdfIn PDF document text
    • http://sentytld.online/tablas_de_multiplicar_sin_resultadokmh6k.pdfIn PDF document text
    • http://mbfsopg.com/pet_jumping_spider_dietzpe66.pdfIn PDF document text
    • http://nizulekun.iblogger.org/infrastructure_as_code_azure.pdfIn PDF document text
    • http://50offit.pro/mpsc_engg_pre_2019_answer_key9btku.pdfIn PDF document text
    • http://003-center.ru/why_does_katniss_wear_the_mockingjay_pinbjkpk.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/nuvebigolegeriso.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/shcplhi/mortal_kombat_11_all_skins.pdfIn PDF document text
    • http://weraka.online/nalawapelilal2.pdfIn PDF document text
    • http://koprovk.xyz/xbox_one_owners_manualepz7o.pdfIn PDF document text
    • http://torixobo.mypressonline.com/83666846687.pdfIn PDF document text
    • http://jesipuvapuse.iblogger.org/teeter_hang_ups_nxt-s_inversion_table_assembly.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/4leiaXG/the_crossing_2004_full_movie_free.pdfIn PDF document text
    • http://circulyarkadigital.xyz/xofolomakidofodevopapdu9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuleraxukopiz.epizy.com/64232971082.pdfIn PDF document text
    • http://rewojemod.rf.gd/bixodalusaset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b5763f-cf9d-43c2-9f5f-5a92b37b2b6e/what_are_the_benefits_of_bilingual_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93c30fa-04b0-4186-9193-037918b38102/legapafabilapagi.pdfIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/timonefokuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d86bbbd-604a-4ece-9a09-c7bdd1fa9814/22759544702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a790f37-af60-4e90-8d5b-58baa1ff8223/dojaxul.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 5288 bytes
SHA-256: 07fa00142a8f1466e9b2068760b81bb26fe2a6cc11f0396d2b4a40983464621e
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 10532 bytes
SHA-256: bb17434cb67e2e4494f34610a164539b85feab18f484396ceb4413b8e5eda224

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