Malicious PDF — malware analysis report

Static analysis result for SHA-256 821d876bada0b62d…

MALICIOUS

PDF

85.7 KB Created: 2021-07-12 16:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62f88ae5f15b730823b99f105550d42f SHA-1: 3f0005b32e6f2bbae1245312c2e06f45ec2d1825 SHA-256: 821d876bada0b62d2c3d008b0a12c85d5aa07fa3cd496044ef867eb64a016eb8
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS upload directories. The PDF document body was unreadable, but the presence of multiple links to potentially malicious sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://goez3.com/10005001208290177/ckfinder/userfiles/files/jemewup.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0860ba0a8---92304294541.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12f3c7ed54---zolatajivazefuboribepo.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/f3df8eeaa8ab613909cbb9de8f48fef8/91511647052.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aab30d2c522---negetagefusulatikoduvo.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30d8bb9546---rutotuvig.pdf
    • https://vrindaindia.com/php/joseph/uploads/file/gejawuguroluwu.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798cb1e75ef---14427221640.pdf
    • http://wwpokebar.com/uploads/files/5006962024.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/l7h6uk8h9ngc7gjh394bia7np0/43786608277.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/56338060247.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/f797a500558513eda72e6842a52ea2dc/befelovifilonevanol.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/r4og5n4jfjcbop6ivilo5i83bv/2316009203.pdf
    • http://goodtraefarm.com/ckupload/files/17119937218.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094134f06120---16735458450.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073bad991017---nurijit.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094eb4d60bc5---wofevumoxowo.pdf
    • http://pappteam.hu/userfiles/file/nugusajupobemufusafo.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076b9e8b92b0---dozelijenilu.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084520f5c8df---faparunabov.pdf
    • http://centralgiving.com/media/userfiles/file/42457073613.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ee172d79f---rizug.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/5e0a9f7e947363cec8cf74e823d26ddd/pedekovatenaxeregidofipu.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb718b260---23381769559.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=chemistry+competitive+exam+questions+and+answers
    • 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_off0000e8f5.bin
3ceaa0d127aa8712429d9470f34a8d21d3f964ee17820adda04bd8584029efa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 11380 bytes
font_01_sfnt_off00010382.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 16792 bytes
font_02_sfnt_off00011b94.bin
bdc8c3ad5d53b3b84b6cc5140aa329a2dfc29fbed649cdf93e8e25e933f642ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B94 17436 bytes

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