Malicious PDF — malware analysis report

Static analysis result for SHA-256 db01a3cbb5e9654c…

MALICIOUS

PDF

98.8 KB Created: 2021-03-13 22:26:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 676bf8d9ff91a382cd3ad53e05574156 SHA-1: 219b58eec193b19c7a3a75f810b37b8d29ef9d56 SHA-256: db01a3cbb5e9654caf95a7eb189d4dbdd07ccd2dd02ac87f79031cc59ede7ac2
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to potentially malicious or spammy websites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve as a lure to phishing or scam pages, attempting to trick users into visiting them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=caries+dental+infantil+pdf In PDF document text
    • http://all-casino.xyz/samsung_galaxy_s9_price_in_pakistan_second_handism3d.pdfIn PDF document text
    • http://civiliscmq.online/un_viaje_a_traves_de_la_bibliayn42u.pdfIn PDF document text
    • http://marketeuro.pro/82274449566lwvut.pdfIn PDF document text
    • http://pitushok.fun/xapilopirobxrjz.pdfIn PDF document text
    • http://evromotors.net/hello_tune_appw9o9e.pdfIn PDF document text
    • http://csxmoney.info/2008_panasonic_viera_plasma_tv_55_inch_weightrs3r5.pdfIn PDF document text
    • http://idealica-ordina.site/mujavimamujajagevr5v0p.pdfIn PDF document text
    • http://joy-todays.online/waxopebeneqmqm9.pdfIn PDF document text
    • http://watertea.space/jakadurzfw6a.pdfIn PDF document text
    • http://rezltml.xyz/list_of_common_spanish_wordsql9jx.pdfIn PDF document text
    • http://lowazaz.22web.org/cartoon_speech_bubbles_vector_free.pdfIn PDF document text
    • http://noncomform.space/lotigekolemuxipakas1hqeu.pdfIn PDF document text
    • http://kaxitijidopu.iblogger.org/53192310990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zofunumuwade.rf.gd/89049940944.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/husky_450_chainsaw_parts.pdfIn PDF document text
    • http://natikajurijufuk.rf.gd/92340615931.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/41753112084.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/slay_the_spire_the_ironclad_guide.pdfIn PDF document text
    • http://wotimadugol.epizy.com/71780558098.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/21799995556.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001203b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203B 4940 bytes
SHA-256: 4b644ec14dc2301bef32595698c2d8161c2166377e1dd46bb23f561fbb2ce318
font_01_sfnt_off0001310b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310B 10332 bytes
SHA-256: 7202591018299a2ec2b86db7342ad6feecfe0c5370df54ff640a01a9072215d6
font_02_sfnt_off000153cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CD 12296 bytes
SHA-256: 301b33bde0e39f756bb0894a01e82800119ac485752b1dcb01cd95a459f26541

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