Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f5dddf083bb044…

MALICIOUS

PDF

93.5 KB Created: 2021-09-05 00:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2bb3815129319e90c7c57e196361c808 SHA-1: 3b626a0ac1dbbd215429cd90ae05cb5b6c9a8d25 SHA-256: 34f5dddf083bb044fb2c3170caacfe000fb21838c65d22116d7ea612b6f22738
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users through a network of links, potentially for SEO manipulation or to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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 http://packamate.com/userfiles/kerikoxovenin.pdf In PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/fd4da6b6a18982a2c9df1adb23d01d27/11984726773.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612637eb85e82---43547514740.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/99287540885.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b21d2a4508f---vijan.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5e6d2006d7da5dee14c748fb8eb92f17/82060999137.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/sasudekirewosibipoxogama.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6d59c75b5026cffd8c3739b086daa95a/46290278471.pdfIn PDF document text
    • http://kokomo1986.com/clients/31029/File/lozije.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fibokubelixoned.pdfIn PDF document text
    • http://exantusfamilyreunion.com/clients/9/96/968554593547eb574606130639276270/File/20873025732.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/jejeduxoli.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4918572e20---14075924080.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999e1566a0b---saxanek.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/48567784472.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/42303258228.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/gusuxi.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///37525384114.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/55653230047.pdfIn PDF document text
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/55092810849.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/33341962599.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/xatogilajakafoxujop.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c085a229d---melovi.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/61839163330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ratio+and+proportion+word+problems+worksheet+grade+5PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 17364 bytes
SHA-256: 81df32d0bfc6336b2e7b01f09f436e2149567bcbef6ae83a4b8c45c0d23cbcc3
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 11336 bytes
SHA-256: 7772fae296edd2dfe837b156d26f63e825bacd2a9708304416de46f96954c8ca
font_02_sfnt_off00011f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F23 18556 bytes
SHA-256: 48f4b1b64e72eac82fdfafc82a28275c4a6b7035e17cf4e4e00951994420bca9
font_03_sfnt_off00014f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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