Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf7eacca4755b2d…

MALICIOUS

PDF

95.7 KB Created: 2021-06-29 11:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2215a45896cb368311bc44ebb20e41e7 SHA-1: fc56d232513e026cbcb9b2614fa07c80af3b716c SHA-256: eaf7eacca4755b2d4e7dfc21a8ba78cb0919153da9653da994e1f9a2f0b514bc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, a common tactic for phishing or scam lures. Heuristics indicate it's a link farm on disposable hosting and a callback phishing lure. ClamAV also detected it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://skogsformedling.se/bilder_umeny/File/43168100531.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fc4fd44cf---numivifopofanududifebez.pdf
    • http://aceonlinementors.com/userfiles/file/fipovobusisevulisizifi.pdf
    • https://eseninternational.com/uploads/files/89324809717.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/dccaef63bbd9d02ec3bbe40d65cbdc7d/52236556626.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a789594786---52286295626.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5123b63d1---xusodufidavabudipaliko.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a926d69fac7---bogiraxuxupazezenumuve.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160800ceb2b7e2---49971237324.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941ffaacb63---tukogufurag.pdf
    • https://dienlanhbachkhoa.info/upload/files/topasunarelidetow.pdf
    • http://chrislahoda.ca/userfiles/file/pojenorixolajujabikotubu.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d58e58fd50---doregovenegafemawadi.pdf
    • https://angelsstaff.com/uploads/file/82382170738.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c27b121c5f9---suvuzutosaz.pdf
    • https://an-professional.ru/img/files/file/damafo.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa844aff67---90156045846.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cf95554e---57907517295.pdf
    • http://rw-hse-businessconsulting.de/userfiles/file/sesitofoduzabavazoked.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/jevimimubununujatamipogun.pdf
    • http://www.hangmandigital.com/files/file/vukasezaxevodijawakurare.pdf
    • http://paillasse.hu/userfiles/file/70737687205.pdf
    • http://ghnservizi.com/file/89423260494.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707967dacd5---5374812975.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/ceafb77cac5a3eddda850fe3dc400146/simigatitupeluv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=toman+in+rial
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 16792 bytes
font_01_sfnt_off0001116d.bin
61da44cd5cbcec953764658399513fad54a58092099a36d59c73ce2f7034fc11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 18880 bytes
font_02_sfnt_off000141a6.bin
8716dcf6171efb028d6d5da8b2d8d44ef8738e37d3605f0162e95d7c734f4280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 9836 bytes
font_03_sfnt_off00015711.bin
6f552fc2e5ec07312a4f430c2f6fd9a0a195414b38145a1e1f73efbad2b692ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15711 17332 bytes

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