Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba72ac9f3b16386…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 10:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4023471e395f5473980ce60329f5be9d SHA-1: a7337b440ea3db63f1ab1540a473653009a694c4 SHA-256: 2ba72ac9f3b16386e8ef32ae037a30f8c7db75ca4e3acf3450454fe16c172d52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=redmi+9+prime+vs+redmi+note+9+pro+max PDF link annotation
    • http://qiangka.com/ckfinder/userfiles/files/vemizuzuxixoludesofilofa.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/060954536590.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/razokadosuzaxoradizixapis.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/88affaf643b098ed737fbfc70d49c8c1/danigujusavunavamazi.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/vogurerikokikogokores.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/bf24fcb3a1ac72c9130860cab8bea818/54330978657.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/nujatoriv.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/d399f3896c2bdacf89342aaf46882e5b/repezeg.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613707751eb4d---rijididexek.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/jajozivotuxubutokam.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/12770307918.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/waxogerukadowawunuji.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/72525465257.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc3e823419---xuned.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ejsd3tv2mbpifj1r788jaulo7s/93186269904.pdfIn PDF document text
    • https://fototipia.hu/files/files/zulaluxipomogemifa.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/kowikajisutuxipa.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/50914902966.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/duxozureloro.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/lidodekodagatem.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/rugaxiviporujaliduxit.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/25801158423.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d60c6709f---jorodizuvi.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/tovutako.pdfIn PDF document text
    • http://jarosi.hu/files/file/futorasutipelifivomejunub.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DF 22760 bytes
SHA-256: afa3149dcd56de898f0e1071ad4432b1910930d453b3c39acf3365d014bf7fbc
font_01_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 10888 bytes
SHA-256: b1f183bfb29b28e68694c87b7bb8609c83321c5cfa20bc7e640c6262a92e0a78

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