Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0d2c491daaccf5…

MALICIOUS

PDF

83.8 KB Created: 2021-08-27 15:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 72b60e1f725e077142f5de6f75dbac2d SHA-1: 4a4878e63b4188a0f1970242a95c000f0fd1cdb4 SHA-256: 9a0d2c491daaccf5e5a205133580e28da11b8d4404349f43cd9d11014644aac9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=napsin+a+pathology+outlines PDF link annotation
    • http://pttaccounting.com/userfiles/files/51957377978.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/mewuxo.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/98753829012.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/jagikeragivowijituna.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/1v9fh4d48c3e4tmlp3c45cb777/vebofonemitadakom.pdfIn PDF document text
    • http://18554080.com/userfiles/file/kavezi.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/ravuxoforasajegozamoviz.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c56e71eb25---garanevaferefuw.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/luzapasemutok.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210619_33011DDCC3E36D12.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/56057508757.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/lawawijuweluwisidije.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/52b93b30a69455b112e3dad7662677b8/ketulaxekigozebisa.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd47b73eed---33309960252.pdfPDF link annotation
    • http://pass38.com/images/contentimages/files/ropironexolusupaleriko.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/93901503258.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/45182660840.pdfIn PDF document text
    • https://noddy.nu/images/file/rozanupisixuwuwa.pdfIn PDF document text
    • http://debden.org/userfiles/file/89656232203.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f52fe58d6---5721639287.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021082314382980554.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/gekebozeluferetubeduzote.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_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 10624 bytes
SHA-256: 7847a76fa48becbc71be34882d1f0367f7984177e5b506423a81efea6a25e3a0
font_02_sfnt_off00011421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11421 17420 bytes
SHA-256: 2f0585811a8a16031e8b02184d28a396aa478976bc831b78fc2f4f524d3c6f49

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