Malicious PDF — malware analysis report

Static analysis result for SHA-256 d455716d882e337d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 06:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9483b89bb3b4f7402825f0c25fa8493c SHA-1: 1b174708653f5b3ce9dc2bccd597cabe0d8a19d5 SHA-256: d455716d882e337d16d71d61c7b6d35bc00cdfe16eb21fe34fb7486974a815dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple links on potentially untrusted hosting suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/6pq9u01970k9d8gedqtufndhqd/59440294449.pdf In PDF document text
    • https://amatnieks.lv/pictures/image/gasiwosuvewexib.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cba0151a7---74030757493.pdfIn PDF document text
    • http://orrizon.ru/images/file/xipusubabaxajubu.pdfIn PDF document text
    • https://seerupit.dk/assens/file/89231035879.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/66223771258.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6e2436879f---sujedina.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/96289440132.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/510333d0b95868997ab2c25206dcced3/xavapelol.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/filijesefutodideti.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/cue9q2aqsvmsgnjkg2d2nade62/mimekubewigijulirulisi.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/kaniwowikukulomuluvexeva.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/fapix.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/fc368237e82807b6601f8f6b74799b4f/542415429.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0uk786djck5giqi69ose4noji1/mujugelanozif.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7c9718af---2154043029.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/2363328b3d1b75aaf03e00da280a0424/396382145.pdfIn PDF document text
    • https://medpressa.ru/files/file/46568087416.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/21183837871.pdfIn PDF document text
    • http://drironcat.com/images/file/sofozevanotavasami.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/sasuwidokafaxelowizosazob.pdfIn PDF document text
    • https://europartner2.pl/uploads/tigadeso.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/58351391553.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=arban+method+trumpet+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_off0000d9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D2 10680 bytes
SHA-256: 2b24bcdbd49fa84f24384b03a3161921e97211103fbe6e5ae01efb37aa4a40d3
font_01_sfnt_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 18304 bytes
SHA-256: ea53e1fe4e982d68a7ae14dc8a3504d504674e79dab5834eb370ea33c296c233
font_02_sfnt_off000120e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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