Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1938cc49c3bec6…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 23:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d90e7cce9db7a3793ced141d739d9ca6 SHA-1: bf657981dde3fd6804b13b1a18e0c4634d23ac34 SHA-256: db1938cc49c3bec6b6af9890b0a9645d30c4bbfabfcfe1daf655b87a9b15a9b3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. The presence of 'utm_term' parameters in some URLs suggests tracking or campaign-related activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://imotrading.com/images/userfiles/lupipomuxarem.pdf In PDF document text
    • http://fapannimario.it/userfiles/files/xagamevuga.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/sivorotipefinuwela.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/milidugasem.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e62c7435a1---48887015840.pdfIn PDF document text
    • http://linza-market.ru/upload/files/sixejavumode.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/kodidokomuginapabopujugo.pdfIn PDF document text
    • http://elementyzlaczne.pl/media/file/pejeti.pdfIn PDF document text
    • http://client.diffuse.info/files/linakoxuxaf.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/96622f7fdf0edcb3ce97a61653a31c61/lonarekigobuv.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aab7b4ae5---84707828483.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/25850794951.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141caf01a61c---rizinimakulakodu.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/84048692928.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/28670107690.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/fekojipodatitokomazaxeki.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/67513176740.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/vokewojapipewim.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e5139d63f---xekegemanereli.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/sazuramaturokumovumo.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/tunizabegipofigakatuni.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/8543177587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=angry+birds+epic+installPDF link annotation
    • 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_off0000b09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09B 14660 bytes
SHA-256: 94eb5d541f033a9ea6a5279b3e0d78ba19adc2023c08b55365637fd7ae9e1912
font_01_sfnt_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 10804 bytes
SHA-256: 6a348ade436cbd4e908ad3a380b5a95577d093b261c2b8f441d896ea89ca3fab