Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dd30563a6f5a99…

MALICIOUS

PDF

92.5 KB Created: 2021-09-01 23:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93fea9e74af291b828cfecb9718ff92d SHA-1: 44ae6ac26c1ad6037e384981b1e7bafee72a0d87 SHA-256: 62dd30563a6f5a998ffc7c712c885904ec57ee7ee2e444635792c6cb81b3863f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure suggests a link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=piping+plover+michigan PDF link annotation
    • http://martonelektro.hu/files/file/dejoribilogiwupaguguzig.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/lufafivugaki.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/96715452040.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/10603125881.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ef94e0368bf5ef97d23bcf72770cf01e/24844110039.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/aaff2b1d4a64977e38b5367e22fd7bda/kebudologisalanotixel.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/39148659466.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/kulaleboju.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/8694b052bad80925b8b5acbc8fbba895/74123232597.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/45251491786.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/putomir.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d00c4b8e73---mefifenivonerewiniwawi.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/rawewa.pdfIn PDF document text
    • http://centronegozi.com/public/92553058391.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/jodedazas.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d580256210---97137477748.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d24481c34---zawibosana.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/bixipo.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/pesiruvujelan.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/58222641821.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/29375775349.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/zegerosagalonazoz.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/nifetekavorujosiwuwezavu.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_off000103d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 18168 bytes
SHA-256: a4743a09d34b9c588ef9f59f096d8a629715185f4ba72b1c9592eb8c64e15432
font_01_sfnt_off00013312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B29 10624 bytes
SHA-256: 09900cbaa0648c48d1413dfcfb9e9f4dda5e840cde343f0cd8cf93f02d539f55

Open this report in the interactive analyzer, or submit your own file for analysis.