Malicious PDF — malware analysis report

Static analysis result for SHA-256 1277f167fb3e93e6…

MALICIOUS

PDF

95.7 KB Created: 2021-06-27 14:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff93674a29769ce487e01020012eb0c9 SHA-1: de8be8d448decff382181e9fcde7d936816a6db3 SHA-256: 1277f167fb3e93e67f85a3cfe7d28c1d02f66b840425adc6c46608747b3aa0cc
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • 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.
  • 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://chiengthai.com/file_media/file_image/file/ruwuvukero.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efd9037562---19777286854.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9e4c411ff---roxujefurutu.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38ecafe3a---zisadaxop.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8470737d7494ddee18af1b933673e3b5/81769589531.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/103b558b0f43672a983fbb3018548c6e/voboxaparigifebimawipelo.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086e07f6b7ba---34575346372.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/tamukok.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-10/20210510124841127097.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c72cc9404be206d4f69071b31212f935/mafuvavon.pdf
    • http://alarcon-v.com/editor_upload_image/file/wusaxo.pdf
    • http://birnagarcollege.in/userfiles/file/46287595503.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e342bdb1---211691035.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/9bcfc2d4171c968e3f676f53e9df57f2/senitemi.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/14e6f9dbe4776994b71557e6a9b6c69a/5478281277.pdf
    • http://driver-jazda.pl/upload/file/75078229024.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/1347pp8d5l6jc08mn35kjcb36g/gonokewexelex.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4962b1dee0---94510408821.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078bf16458b8---gujagewexixem.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ee58d804a---88690884081.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/lrl17m6r9q10565f3uot8frdtg/xitugelevifamosetako.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ommu6vk8npgcat68ja36o69931/mividolakiraxafudoxesuxo.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/037b98966980021ecfea64045ee1de41/63955032651.pdf
    • http://atut-biuro.com/uploaded/file/lovinajukadoti.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bd4df93d---55827009991.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5076f20c8---45019322233.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=what+to+use+dukkah+for
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc16.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 16312 bytes
font_01_sfnt_off00011222.bin
d96d806bb00f5e6e1c0e26d5e8d6a1d0f85551e06902fa480b2a3498f670b667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11222 10396 bytes
font_02_sfnt_off000129e8.bin
b41164d779d6e6c945cde13978665acd87d6acdeddd72478dc58fe7d4f369b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E8 17876 bytes
font_03_sfnt_off00015920.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15920 16792 bytes

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