Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ee5a1c89be65f6…

MALICIOUS

PDF

90.2 KB Created: 2021-07-19 17:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a9489cc06cb1ded7a81d7fb675a63261 SHA-1: 065d43e1f02cf589ee4bb302532b5e9ee78fe4f3 SHA-256: 42ee5a1c89be65f694e2316622ce7f2e48ff3813e207c834b135b336bfeef640
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1322f0b137cd8e756b49df0ef701a604/tunajatifekitosamuzi.pdf In PDF document text
    • https://resonanceacteurs.nl/userfiles/file/31500155165.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7519ba5c8ddb2a0dbf3f84a04d17fd9e/rejabo.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/suvarudapatul.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b34766855---54739379460.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/40562533776.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/cbc0f80e92e447318fcaa137cb8a2315/61069631047.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/xelopizigutitobuzenigaf.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e481585c99afc4d11e674a4b33967a34/55960692271.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/witenavuxewumotorol.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcfd8e5abd---ravokiga.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/dbece89e8b8087878c944b553a148e58/84158115075.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/03badpf9rfn1amgul76e70t5j5/fakidato.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609befa99a63e---53590834311.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a4333feeb0067037c7a58ef43d37de5/lodal.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/149iem32bv5al6clpc9oorph05/98999071765.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/67290196670.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/topenopowozebusapo.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076cd64e83e1---toferebinilerupilubawepim.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/28494312381.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/toziwowipiluroxero.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/81569046747.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/mozemotog.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210626060849708873ruw3a4.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/cdfe740b5fc29435b0f02bc75703c2fe/vijirusa.pdfIn PDF document text
    • http://superpart.com/files/31780083377.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/diwogitixoguzutowena.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/914515c5c330bf0c67e2e50f311739d7/dukoreteremanumutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=g+wagon+price+2019+in+randsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 17972 bytes
SHA-256: 5612bf632847c77fb42b9ca20f57e5b9ab779697eb14e0e3869abd178d45ce89
font_01_sfnt_off0001293c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293C 11132 bytes
SHA-256: 23a6102127bc6f15d0f50f56ec129ed013845404ec78810397b60a8b549f15ae
font_02_sfnt_off00014348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14348 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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