Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f2c2e35e806095…

MALICIOUS

PDF

80.8 KB Created: 2021-09-05 19:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6b8bd8fc14c119fdcefcaa4b4c8b80e5 SHA-1: f1034903da49ce4bdbf9d88e6dcd020b6e11f648 SHA-256: 47f2c2e35e806095be22ae1c88895e32d01f6ae05780ebfb21dc46eefb7c90e2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content or phishing pages. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://potentialdesign.cn/userfiles/file/1629280376.pdf In PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50a6d6f424---93147768362.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/82960106206.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7bd82cde2efbba3f1cfd7e98530e3785/98977883707.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/16530689aa35025af226e5fcfffa8673/melukavumupajafasotudasa.pdfIn PDF document text
    • http://bjjiffy.com/upload/82220609351.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/tadenowoteseragutexi.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/74651786107.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-13/20210513150501313919.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/545bf1331112abec981af05ed617c35d/19485168234.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/tumawogu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075b6e52dedf---xadetixuvozutovitowotu.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f167b276f---53946982522.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/zuzufofebamupogofoxa.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/xujowisudipojuzugit.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/96959326085.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/99faf5f79627ed4be3f2ddda58cdc432/26927819777.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9adcab892---2397415170.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/14231009719.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/vokogoj.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ca4030edf---1229324603.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/cb4020f26cae777e978525da7f65d9be/tejozilanisajufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=sizinio+ortopedia+e+traumatologia+pdfPDF 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_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 19136 bytes
SHA-256: 9cf44275b8cff7703e923cc937ae7232ee00eaa3f43624d04dbc7c683db572eb
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 10908 bytes
SHA-256: 1fe5be62d0231664fea7485662b13c0afb8f6b112c6332490c8ece2e0891e25a
font_02_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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