Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e0ad3d30a039e2…

MALICIOUS

PDF

89.9 KB Created: 2021-06-29 06:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc64276955de666f1fd4b48b28a65417 SHA-1: 7e96a1efd9d314dc124cf4c10e17bbdec25d7e73 SHA-256: e1e0ad3d30a039e2d95e620b9d8c2939fc911fa2a8c8087856f0d64d53345618
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, some of which are compromised WordPress uploads. The embedded URLs, such as 'http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077accfae0c5---duzifufufudakegef.pdf', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://woodfur.in/userfiles/file/90069262570.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160da3321e7493---28199533892.pdf
    • https://cristalensi.com/public/File/vosab.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac497094de---77978593035.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d1c7988cd9b3281f1f1188d1468a9b16/jubowufiwutesuxesasukonan.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ltvdaf87rok7ep38tng5o0i7h1/xibewuviwuropevifana.pdf
    • https://salvatoredivilio.it/userfiles/file/dobifekomufozanumi.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077accfae0c5---duzifufufudakegef.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077be0b375c7---defadakefoluxoxokabum.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bac858974d8---81384230677.pdf
    • https://webvitamin.vn/app/webroot/uploads/files/xurifume.pdf
    • https://personnelcle.com/userfiles/file/legixevufasararadujefabaf.pdf
    • https://senhewood.com/d/files/mamomaxufolutabuwixa.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d16612a04---mimurigakavupubojex.pdf
    • https://machinex-machines.com/UserFiles/File/lefimujavetizudi.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61b65d025---dugiranavojiw.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160846c6512b24---72517521148.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d938e89a485---xiwerules.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4c12c789f82c11eb1aa4c1f948ef3cf1/fizaxawawipebotuzonirelob.pdf
    • http://busangh.com/attfile/fckimg/file///2021062742136_1005723484.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/7890c97b0e1b821ee443b86a88bd28f0/12769619546.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/rrpelklo7nna38lc20cvhhfvq3/manujolen.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863a27af3a8---zejukagul.pdf
    • http://teraval.cz/res/file/74676789899.pdf
    • http://taiwan-casters.com/userfiles/file/petumekajamokotedojas.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=oh+my+god+full+movie+watch+free
    • 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_off0000fad3.bin
07d8d1b47dc9aa8c9cb59256764af03693e4ed3bc34953af67c526d8d64f61f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 11044 bytes
font_01_sfnt_off00011465.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 16792 bytes
font_02_sfnt_off00012c77.bin
21d305537447eff2c38192ef19b7d3b1e4a876555d7dffe6b638966b3ea19d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C77 16900 bytes

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