Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c1dfd7d88d6f49…

MALICIOUS

PDF

84.0 KB Created: 2021-07-01 20:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 835d0c823f72e5a1cdc77a472780bd9f SHA-1: 174070722b223595fbc325c66c6882a9cb608672 SHA-256: b3c1dfd7d88d6f4952749aa6b98c3c03c4cdf37c2cfcc950791dd1142481c4f3
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous links to external resources, many of which point to compromised CMS upload directories or disposable hosting. The embedded URLs suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://frangarcia.eu/upload/file/99567752209.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609477453bb83---86667815728.pdf
    • https://erdenetpost.mn/userfiles/files/8065568594.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/e758b07b693da3d51fdd8655e2d2d79b/85182387858.pdf
    • http://hasyo.net/files/file/9775253367.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071530eaab14---94912870205.pdf
    • http://adamlegal.com/userfiles/file/39378981682.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160773c2d2c81e---11987121884.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f326bd003---48813121628.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/be1502a438c7f08a156b8aea96c603cd/28282759078.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/841bf9376c9d75dd82575a782049f1cb/bikozise.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41f70586f---jukubipize.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/821890c8d7a7cc2d88420025e7facedd/33576786232.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b42a70b8e---zopos.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092097ddf10d---95449625805.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/a8ad8648b84871a96567deafe3b59ac3/juwowove.pdf
    • https://healthmatters.me/userfiles/file/61262773869.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca40d773067---ritili.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/fa3320a00da0a39c72a5e2456b845ca1/dafekadefanadalutasununu.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c477a2cb053---bapakavivafaxoxef.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6391550de---14455397377.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e26759eddb---josogasuniwukunekugilog.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/37113253127.pdf
    • http://chinajessie.com/seadata/data/uploads/img/file/162257092816.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/cba3iag75chn0edm848rkos70a/233341847.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+you+save+a+fillable+pdf+and+keep+it+fillable
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d8.bin
ece4282b76308d17004105e4ae570a6dafecba953666f0e7e121d633a463d777		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D8 17456 bytes
font_01_sfnt_off000110de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 16792 bytes
font_02_sfnt_off000128f5.bin
3d1a4bf824b2abac34dcebd5e42606006f59403f7ebf344eaba6ba22d96505d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 10980 bytes

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