Malicious PDF — malware analysis report

Static analysis result for SHA-256 896aada75cda0db0…

MALICIOUS

PDF

75.2 KB Created: 2021-06-26 17:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de542861c4f0d38bed6f6a512cccafdf SHA-1: 0010f0b7b3c82e9eab0337f95cfcb648d832108b SHA-256: 896aada75cda0db053d573118e24c24e3bdf391613924895fea5695df8688bad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous external URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure suggests it's designed to lure users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/18644702526.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e051ee1ec---kerex.pdf
    • https://mvservice.it/file/60016376474.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b48dd8a2f9d---50792548763.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607742d3c00bd---pokasutidixuda.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3086869c---78811874571.pdf
    • http://jandebruijn.com/uploadimages/files/60729493848.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce680ea387---pakerovikubegusuveja.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/62ef119618a8e4a21d45f32da95f9534/lidijerixamuponun.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wasotadopigaseragip.pdf
    • http://akcjonariusz.com/UserFiles/file/2415526282.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbae7f33fa---56123516831.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/akgrqqg6197mfakk5tm5shrfgh/nizukij.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0390d55ba---fifabiji.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160794bbce98b3---18974810998.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/2rf0092trg6chuke51u2cbhsc1/nanafezewalulowu.pdf
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/94209266921.pdf
    • http://ilturismoinitalia.it/userfiles/files/xobolago.pdf
    • https://aksukartela.com/images_upload/files/83471062896.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fe43ec5b0---kimetalam.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a41abdf5c---39646759915.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201da9dd71---99810254645.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608a845b65537---25806771911.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700fe3619d8---55230676007.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=jack+russell+for+sale+near+me
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c474.bin
a51e8825d5098b2554d36d7cf9401da38801b825a36b6ac695d79f2d8cebbd3d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC474 10488 bytes
font_01_sfnt_off0000dc59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC59 16792 bytes
font_02_sfnt_off0000f46b.bin
d4f125d87c91d019f702254064562c96bebbd0243f423f7b98f640089d975fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 16476 bytes