Malicious PDF — malware analysis report

Static analysis result for SHA-256 036c40c808dbefa2…

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 20:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ddc7ae8d1c72402a198e50523d1ec80c SHA-1: 905d746be7ccf463a81aca5c4ad91b64f3063351 SHA-256: 036c40c808dbefa203961b4465d4d1126422c5b1e54a7df6e28cbf4f5e913288
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised websites and potentially malicious download locations, disguised as a free PDF download. The presence of numerous external URIs and the use of SEO poisoning tactics suggest a phishing or malware distribution scheme.

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 https://smidgel.ru/uplcv?utm_term=suddenly+royal+pdf+free+download PDF link annotation
    • http://hoinhikhoavn.com/img/files/77567613674.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/3078dff02a59bc8b83d5e0c70e8e8ed8/nepiwu.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/15231729532.pdfIn PDF document text
    • http://ecole.ru/text/images/file/69832557874.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/usa6k9j13upsbjdl1bc18gqo27/kexisolumader.pdfIn PDF document text
    • https://upaspor.com/resimler/files/wunavowolo.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6ab1b727d---guzub.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608406624bf69---kosunososenaxonijarezob.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/14750993065.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/161210e6ba9510---dinifisizanoluwez.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/1ca6e5bd7ea2623d5a13fcb54eeef2fe/waxuxikilabizov.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/pitularabalegofuz.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fac562c65---60618107381.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/66861328760.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/rufogibabizitifi.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/wamufebul.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/36022934323.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d4724fc99a4b0c49e236c8b792b2fc75/55794272666.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1e4aa5a35746ead272728d8263a14add/10558380316.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/3803499982.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099e5b15bfe4---puzofudaremi.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0ed10b3a8ab17d0bf272316178b56e81/ralebu.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c01233acef---mewipelu.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_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 10508 bytes
SHA-256: 4169c9205e771fd136f62a63ca5167631b2024472fc153fab2ac0ba965e23112
font_01_sfnt_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 16656 bytes
SHA-256: 747bfe69964bbcac9d48cffe33380fa7eba7dd441e0145993802114a079528ee

Open this report in the interactive analyzer, or submit your own file for analysis.