Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb853b69572e2652…

MALICIOUS

PDF

128.9 KB Created: 2021-07-04 23:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cf1d03b52f0c2f39dcd2824c67c516f5 SHA-1: 767399643c3286660577c6694f555ed5164842d7 SHA-256: eb853b69572e2652e2dd950a4d782abdf7361274b1d3bb84b36b1a63927869b5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://crewmak.ru/uplcv?utm_term=kirsten+dunst+once+upon+a+time PDF link annotation
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/sadatoru.pdfIn PDF document text
    • http://envigest.cz/upload/file/zabefolakipusijog.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/4321b66ad1e18ad46dda21f37b16affe/padidivogobuzibetefutedu.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/busagapepesokapuwuwi.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/tukukimawotajalogujerenis.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/16c927ffcf9f21b3049eab3833863cc6/noniligegamelu.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/51219311905.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b121c6e221---88845480938.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c0bcfd4206d863eae52f2f87c5e022ec/semixurulizevusavi.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/u5q4ap4uetja9geqmdhon26dn9/nugejul.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/8518332888.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/rufawexekatukutave.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/sefavudamep.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/29958145271.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b77a169356d---89737663567.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/tijuwagozu.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/mesenivevaborurazod.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/12850740891.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/b0a03212acf4762c79f1c4f884337f9b/17630427127.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35b4338908---65729044035.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/4015fc62f0665b2f9e539b2b828867be/kavafosubaki.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/5e6b7729f22fed07f75f2e819c4573ef/5511475677.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6922271bc---kobafetawewefedefesusop.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bb48591bd11---tewuvosudutopixejajobi.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/e07a580b2d86beee1a26c5b4942dbaae/33953470224.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18077 18104 bytes
SHA-256: f33431978953bf6b358f015b57b70f0f8ff5cd908289fe4c6d7f66e3d0cdae0d
font_01_sfnt_off0001afbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFBE 10720 bytes
SHA-256: cd16e51075075156ee3e48516750a5a60367929ea4db704aff6a8fe1c58ee399
font_02_sfnt_off0001c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C85F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001e070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E070 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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