Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd28d7c2fafe0ae3…

MALICIOUS

PDF

182.8 KB Created: 2021-06-26 03:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77b308c39bcbe618fbb2c328d5a787cc SHA-1: 5273a4c816d549e3b241027df03439ac4e8269c3 SHA-256: bd28d7c2fafe0ae38149a98fb5a318c2c769ccdefe69da94323f4afbdeafd21b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised WordPress sites or disposable hosting, likely to lure users into downloading further malware or engaging in phishing activities. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9172

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://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f5e0e873e161c17b9c714ce505575736/58201706484.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d5c53783---51024147912.pdf
    • https://m3csrl.com/file/fagidemesodoxofagixajoga.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef65fe2f92---56932324382.pdf
    • http://brmxn.com/userfiles/file/20210603131457_c0ub61.pdf
    • https://bawwabatrizq.com/userfiles/file/jamalidut.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1ea06212---59968793846.pdf
    • https://hanahana.vn/media/ftp/file/45388844820.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c317f8e948e---4587761441.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c7d47e45f---xizipap.pdf
    • http://salonorganica.ru/upload/files/jitikenewon.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/c985d7f94b53239d0671bc565d7726d5/69535988227.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaff4841f41---77468106987.pdf
    • http://allaboutdowney.com/userimages/10336657367.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/018b993a74fe957a2dc87c8533e60d0f/rozodagomube.pdf
    • https://mebelihome.ru/upload_picture/1511756352.pdf
    • http://delvalle68.com/clients/54584/File/rupenagamodobumamefado.pdf
    • https://arerp.kr/data/file///2791899129.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/16d742300e18f9b89485f9fa72da769c/85058571545.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/c0fmliv097ekgpvguo0u5l21ah/44683732429.pdf
    • http://naturallabs.de/userfiles/file/80205078232.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d5228c40c86---danesavosus.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0427a1de6---92163765986.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cqns15qttdsjb5ji2dbe7kv8n0/65823167659.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f93abd742d---4786159889.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/37b0331c8733812c5db47bdc71e7a816/27870306050.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fbda56d37---94103458648.pdf
    • http://vmkmsz.hu/userfiles/file/vitenigomidol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=vector+mechanics+for+engineers+statics+and+dynamics+12th+edition+solution+manual
    • 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_off00024a4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A4E 16792 bytes
font_01_sfnt_off00026265.bin
7a858743b74501555bc0e39209806b23b74886d050ac98c16e7d558b5b4548e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26265 11280 bytes
font_02_sfnt_off00027c9b.bin
1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27C9B 16168 bytes
font_03_sfnt_off00029233.bin
112239d74b7c36f83c0cc510df6a7297b8c0456cd02a83ce2711d38605f7b6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29233 21456 bytes

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