Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e7e957f5e7b995…

MALICIOUS

PDF

168.7 KB Created: 2021-07-14 06:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 207d8e95eb7d0e07caf4234806904e42 SHA-1: 6800e84475be1c316e588555566f28817ab7fcc3 SHA-256: 14e7e957f5e7b99599a5df0fa19ea79b3d47e1c6205ae94dcf046b699caf3e93
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on potentially compromised CMS upload directories. The presence of these links suggests an attempt to lead users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8342

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kirilmazbardak.com/userfiles/file/58370614044.pdf
    • http://caudafotografia.com/userfiles/files/tigerawejerabanof.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/323da60a75fec16b5878144d1b90917d/66216726427.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/87c5600ad0dd47b21106d962e0ffc906/62068031425.pdf
    • https://paron-rebondir.com/uploads/files/22447283528.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160717fe1d3a8a---51904400109.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095948084ad6---52968151294.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160baf8a04d8b9---metupikeje.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b557d3e88---95961600295.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097f65a51ee4---52698614456.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6f9b4617b4b3cab9f6244293083775f5/kegelo.pdf
    • https://studiopros.com/userfiles/file/
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/38369469376.pdf
    • http://vinczeandlaszlo.com/upload/musiwimutujasija.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6603765ff---71272551812.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/65058a36488de0e2d4135cf835312db1/7153297574.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b30ea78f0f0---xezejaxatovotab.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/zejijus.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd67a3ea7a---22959680836.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/61e195a6b4483b3beab1296743a4afd2/tajogafipiwibabakawar.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074461e5a0ac---16521761205.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c17607ea4da9926447904d90f23b0356/11408662708.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85d9047d8---jevodidefov.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160974e6834d8c---nalifil.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0bb4d08620dc246425de2ad16f8435de/95259810771.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/17ceb460a3d04d875e93747172b15e1a/fefakipij.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/99f6a408b9a7304e78e4d39700a686fa/desamipa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=chicago+age+of+consent
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001beca.bin
b5dbfb964e1b4896b9196538d28c4a60d06060db58763a5a1c752e75cafb8f17		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BECA 17704 bytes
font_01_sfnt_off0001da2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA2C 16792 bytes
font_02_sfnt_off0001f23e.bin
371dea8d49e452ae913577314b51659bafb1ac17fb5bdc76e9e4f1a0803882bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F23E 18772 bytes
font_03_sfnt_off00022361.bin
b1624ebf1cdbcd28b27f95621d5d34e3ae38351eef36fd2993ef2eab616d7795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22361 30504 bytes
font_04_sfnt_off00027a51.bin
02cbf89a8308070165b406e2da3cef028ca9aeb5061017d9311470e6448fb5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27A51 10500 bytes

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