Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eacf522005ac6f0…

MALICIOUS

PDF

77.8 KB Created: 2021-09-05 17:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3c2df412e2ba20810a99457165cac854 SHA-1: 214083a07a350781be4fc1ba815c7bd3d1e1ed08 SHA-256: 3eacf522005ac6f0faa12c683d96e9c18dab5043ee9051a389703ff6e9374b69
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure suggests a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lawyerupsmart.com/tempimg/file/21568136873.pdf In PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16087aa57081b7---zisibadonaxuvepapava.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/setof.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/jukabujaxefivofigar.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/03abb5e4cbfc2a789abd39680e48babe/15555920435.pdfIn PDF document text
    • https://sitarasign.ir/data/file/58693087078.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/2931998317.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609118441c628---zefuzixewutobegi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8fc8e4b2---jovalagu.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/61321128904.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/kenuvowokibukutebirafe.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/91408993159.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/nogasiros.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f959c291541---nuzejabifubevewofiferi.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/4816803669.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/wuzoboletegejoxagadili.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fcd9ce8b4---61184446281.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/dadufcki96j6t9jfm2amk84cr4/99857648671.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/kdik1vkfbd6n9bkdnqcbnubn22/lapefeser.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/kubegoxere.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/956ef28162b9faba998fb956c95b1fa6/62490540662.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/finogewaj.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/63704400268.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ebb3e7638---70016028348.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/75711485971.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9d7258e6d---30489382775.pdfPDF link annotation
    • https://techson-cctv.com/upload/file/fumijinojuxugexoveteliwef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=victaulic+716+check+valve+manualPDF 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_off0000c84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 18356 bytes
SHA-256: fd2493281a5c3980c3c78f61cf9c171c28e0fb573639f7818a8782f86b120d46
font_02_sfnt_off00010fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 10604 bytes
SHA-256: cd9b90673bef8e0533c3fa99a4d47e4030e64afb732152c9d8536279bc0b1506