Malicious PDF — malware analysis report

Static analysis result for SHA-256 4190ffd8fd99602a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-18 15:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 02e541a4138963ab63c21ac53f77ae5c SHA-1: b143cc74d6b6dfba7ed1ec3c7b932d7d6e2e14a9 SHA-256: 4190ffd8fd99602acca7511216db63ee23df19f6aba8148c63cd8727668c5249
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 malware distribution attempt. It contains numerous embedded URLs, with a primary focus on https://maypoin.ru/strik, suggesting it's designed to redirect users to potentially harmful content. The document body, though partially corrupted, indicates a lure related to 'How to write a reflection article'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=how+to+write+a+reflection+article PDF link annotation
    • https://cdn.sqhk.co/sileluzorupo/bjjieLJ/82145431603.pdfIn PDF document text
    • https://nupinegudoxaxu.weebly.com/uploads/1/3/5/3/135350485/c33c4cc58fcd76.pdfIn PDF document text
    • http://fridgeservice.ru/xifalutov8xdt.pdfIn PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/gusonarajuzefa.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/dosafud.pdfIn PDF document text
    • http://card2card.live/rigipobusenisisuzalgb1v.pdfIn PDF document text
    • https://nexolibevi.weebly.com/uploads/1/3/4/4/134463206/662dde3106cfa8a.pdfIn PDF document text
    • http://fresh-ita.fun/schumacher_charger_sc-1000ahzr0r.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/jcicidl/race_master_manager_mod_apk_download.pdfIn PDF document text
    • http://mavurelaro.22web.org/kendo_ui_grid_footer_template_format.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/jjdibgi/nofaxufinidubuvaraf.pdfIn PDF document text
    • https://cdn.sqhk.co/nemizuxe/idijIep/irritating_alarm_ringtone_free_download.pdfIn PDF document text
    • https://xafineker.weebly.com/uploads/1/3/4/7/134701786/9698510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juruxevidenax.rf.gd/slipped_disc_exercises.pdfIn PDF document text
    • http://kedipakusox.epizy.com/97155580568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1b354e-5aa6-48a9-8ccf-a86089257b43/fikakupafijaniku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613b82f0-a6db-4343-bcca-33dba1773652/780307884.pdfIn PDF document text
    • http://zedotedifajo.epizy.com/lolunazenijupezeda.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/18951137325.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/95498345175.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/what_is_the_product_of_fish.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/99672772413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9271934-2651-4ac0-b6ea-93128405e666/diario_en_motocicleta_pelicula_completa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 4752 bytes
SHA-256: cf8fd4bc494b831f84775047de5374ad61d44002f7bcf49deb746d52eca40400
font_01_sfnt_off00010254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 10628 bytes
SHA-256: 16009970aa447c7d66981014b7595902d0b49f584211c0fda2f1d0e7979867bc

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