Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2f90ef5227c135…

MALICIOUS

PDF

79.0 KB Created: 2021-04-08 01:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ca120d84adc533675a0fd580fa8fa9da SHA-1: 08799314c5aa79954635ee0202b1877faf8bc1be SHA-256: 2e2f90ef5227c1356dcd9f0e33f2fc4382ae4a08b079d7bba2ec5084494209a3
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a phishing or malicious content delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/strik?utm_term=consider+phlebas+reddit PDF link annotation
    • http://mosovonetuvu.iblogger.org/zukoleborusogalumu.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ghgYiil/35359449770.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/C1fif6Q/first_line_antibiotics_for_common_infections.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/jdgz1gf/atwinc1500-_mr210pa_programming_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/ifjijhp/among_us_unblocked_free_no_download.pdfIn PDF document text
    • http://xuvepawa.iblogger.org/government_job_alert_apk.pdfIn PDF document text
    • http://wabopegugon.22web.org/tewezita.pdfIn PDF document text
    • http://zamikubano.22web.org/mejazawetotokajavezirofa.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/jeAWXhb/turquoise_blue_diamond_glitter_live_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/abGn5ii/pizezotifikisegejugem.pdfIn PDF document text
    • http://titatirivizikaw.iblogger.org/pazugitezir.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/technivorm_moccamaster_kbt_741_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zatajuvezutulo.rf.gd/rovejawesapixitizobebofu.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_8f5f0deba57841cdb4ecaedf76956480.pdf?index=trueIn PDF document text
    • http://zelafofavelak.epizy.com/phrasal_verbs_advanced_list.pdfIn PDF document text
    • http://ranedugipepin.epizy.com/because_the_beatles_partitura.pdfIn PDF document text
    • http://gipenebome.epizy.com/42392210799.pdfIn PDF document text
    • http://rasiritodir.rf.gd/aphex_twin_printworks.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_1f717b66d13a4b0986ae4b33fff4e116.pdf?index=trueIn PDF document text
    • http://xepujeroniwazip.epizy.com/metformina_850_usos.pdfIn PDF document text
    • http://tevaninuwimo.epizy.com/62398400047.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_72ca33575bc444fcbc8ce6de022e7809.pdf?index=trueIn PDF document text
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_dd8b4671bb7d43b8b60c583861861b9c.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_a685e2a845a7402a9af1c0057cb0b397.pdf?index=trueIn 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_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 5092 bytes
SHA-256: 0e8cded93c261e0e71cbd81d3c63f121809a7ba93e57907844582aa1779acb37
font_01_sfnt_off00010bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFA 10196 bytes
SHA-256: a4c1718633e70b52ba049fb3bab2aafac53cbc5c2e16099e192cb3eb0770b1bd