Malicious PDF — malware analysis report

Static analysis result for SHA-256 454f411051021072…

MALICIOUS

PDF

79.7 KB Created: 2021-05-11 17:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a5e9410d81aed5289c94eb3cbbad38e3 SHA-1: 71d69ff6abaeffe463bc818ee91c704720312f94 SHA-256: 454f411051021072cc28788b8e42c875134e399af1f25a39222a6a675d3f6885
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to 'streaming ita' and the authoring application 'wkhtmltopdf', hinting at a lure for pirated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=mary+poppins+returns+streaming+ita PDF link annotation
    • https://nimuneroz.weebly.com/uploads/1/3/1/4/131407882/mezesajadotuxozem.pdfIn PDF document text
    • http://sanadewa.iblogger.org/chiari_malformation_cerebellar_tonsillar_ectopia.pdfIn PDF document text
    • http://karupumad.22web.org/58138808468.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/fuvudekepekedaxatoxo.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/fubinuvulerom-faruvebajop-jaravug.pdfIn PDF document text
    • http://tanuwoxomasosog.22web.org/bageginuwitavagotupufawaf.pdfIn PDF document text
    • http://jokebixa.22web.org/47870863220.pdfIn PDF document text
    • https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/dagilidop_murala_bidelomut_veral.pdfIn PDF document text
    • https://zoviwifave.weebly.com/uploads/1/3/6/0/136053666/gumevadofagisubulo.pdfIn PDF document text
    • http://babysampler.com/cultivo_de_arroz_en_ecuador20r6e.pdfIn PDF document text
    • http://topsale.pro/2005_honda_civic_hybrid_repair_manualcpbib.pdfIn PDF document text
    • http://cardioactiveitalia.site/sisirumukutabgqgd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijuriwamob.epizy.com/carcinomatosis_peritoneal.pdfIn PDF document text
    • http://tezezufiru.rf.gd/warehouse_management_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca3dc5d4-ec19-4931-b200-f7a351c13dea/29372580033.pdfIn PDF document text
    • http://lubozudaxik.epizy.com/76667070221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434d23d2-ee36-49fd-9f3d-5c05fd78da22/navien_tankless_water_heater_240a_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146419f5-3aa6-4956-bbd3-04a78010a81d/4016619839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68db1211-0dab-40d0-9363-bb527d2e0081/joseph_campbell_books_online.pdfIn PDF document text
    • http://putetudufotu.rf.gd/ginetoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbfc35b-6d9a-4213-9060-048088d63d0e/47279970435.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_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 5212 bytes
SHA-256: 297f2a54b25a53e4a6ca33648a9733079334f9fb6400c68fe037a69da95a1fce
font_01_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 13376 bytes
SHA-256: 9c47aa7173dcea42820a4dba8d3a6825c46d6ab8bf737da50eb53b8badce88ac

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