Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0504ae24e84f97…

MALICIOUS

PDF

81.0 KB Created: 2021-07-02 02:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea8a5a1e5a65c14e304492f5bd1faaa1 SHA-1: dd5fb6f8b20eff0bcbfc44ce90a1aa5de781d19f SHA-256: df0504ae24e84f9799c7f5a8526dbfc3e56185e3bb458806a8c89fe6d59448b9
196 Risk Score

Malware Insights

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

This PDF file contains numerous links to external resources, many of which are hosted on compromised CMS upload directories. The presence of a PDF_RANDOM_URL_LINK heuristic and ClamAV detection as Pdf.Phishing.Trojan indicates a malicious intent to lure users to potentially harmful content. The file likely serves as a distribution point for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160846e66535a7---nilasojoz.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e070b63245eaa424c510dfebbfc9952a/xowezilon.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c5b19e96e95578057bfefcc37e67c42c/pemaz.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b756cef2c4---27468519271.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e830680843---jipefatewax.pdfIn PDF document text
    • http://strandedtattoo.net/file/85202791272.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c0732c2385dfc6d8e08396d476e8493c/gegurubunorome.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1624797973665271727.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/fapenavizimarodokeku.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e63d67660---fuxafojijiretak.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/xuzifikoforopi.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/69548733349.pdfIn PDF document text
    • https://noddy.nu/images/file/13464361499.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735e0bd85eb---18137619600.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/77836631395.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97d8dc8f6---68038335573.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/794eb85b19ef31fd6bf44c1d1d2e2019/gofeperapukalufojumufeduw.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/rugoworazudag.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/33335223505.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea9e8bc93---pakumuzedobadojo.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5150e176224e91d1ea9aa7faa7d854e1/59734595676.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/junikejodamimurukabakipol.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/065a30a985648cb9948b9d3ac3ebe74b/bavoritazafobonisutefukam.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d18ff0ee9f0---9531951930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+talk+to+anyone+download+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a58c505e0b44ec7ed7a62edf8983dd9b/razovawajikujimu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC03 17060 bytes
SHA-256: 096ff5cee925f4996046c01dab99e9a65cb98d7bf103dcc820fcaffd140b29c7
font_01_sfnt_off000107a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBA 10412 bytes
SHA-256: c007ad649fa60f3fddee4185f450929ce80db7db69e3fe2fac66e883547dc71c

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