Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45821704520bd44…

MALICIOUS

PDF

158.3 KB Created: 2021-06-27 18:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 40824a55af709204e868b9d9e3a334c9 SHA-1: 47231a8f3c47a2441623495a90fc796f998f1d6b SHA-256: e45821704520bd441cd0d6f5d8940a1d20d3b5317293ec9c70738d78405357a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://synerhu.ru/uplcv?utm_term=caste+isabel+wilkerson+table+of+contents PDF link annotation
    • http://sequirk.ie/userfiles/file/kekonudofavatederoduzipux.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/91925347181.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210609181920.pdfIn PDF document text
    • https://famecosmica.it/file/21254556701.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/40367775994.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d1de8fc613d---mugatodejumima.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa42e32ec6---jedufilodu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6ca7fe2179a6f67ce4becea6bd6445cd/kimuvaxizuxesufafowuxo.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c787c4b664b---tokutaridetilotuji.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5854a2d7fd---bejinujudoduwaxajazovo.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/vj56n7rik0mvg9ekufpr93tqop/90238024814.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e5b7bf28c---matowuvijoroj.pdfIn PDF document text
    • https://groupunsur4.com/contents//files/tononaxusega.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160821835a8b03---wugidokupukiwulum.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1984cda6d---37405401744.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/078654810b7b0d8fc03bda1958fcdb9e/6899995403.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/49748605121.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/bofozumowiwuduletibegafix.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095faf2d9211---83446192126.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/3njpe5m8lptcsnagtolhctrj5q/sunudaroluto.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/52327353541.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3f89edf02---84792614216.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80d65c655b---bixevel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20910 10676 bytes
SHA-256: 5c294acf5b96ebe653ed1c6d148ac9b38c00f593d34aca4542821db821c81e86
font_01_sfnt_off000221c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221C2 18388 bytes
SHA-256: ea7820f557f47ce80abad52bf7218c736a6fd6a3b2775a60f97682ce3b3ee94a
font_02_sfnt_off0002518e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2518E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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