Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0c5ecd4a777acf…

MALICIOUS

PDF

84.9 KB Created: 2021-08-01 03:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9e98edd6d17892d00cacf03a2e39a10b SHA-1: c1279943ebdaf40e6ec5a62e0d8938923a09ad01 SHA-256: ca0c5ecd4a777acfbbd4e91731973a67e55daac92ed46adfb3710eecc4c3baf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting. The embedded URLs suggest a phishing or scam attempt, likely to lure users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://huntic.ru/uplcv?utm_term=free+maths+worksheets+for+kg+class PDF link annotation
    • http://mini-garden.ru/userfiles/file/xolirew.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609361b39b5e0---zexotasagupibarowufikev.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/vjm8h024sc7pc0dr37hcaiaecr/93386222155.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/noxofanedaveki.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/557d5e9d56aa5509625d871385dc52cd/kosumuw.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/65103631730.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b4f29a28340f5cda1fdd7888cf8502f7/zimapugagufipis.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8dcd1602e---gujevifalawivoliri.pdfIn PDF document text
    • http://thermocomfort.ca/userfiles/file/91852379211.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ecde89197e2---5541674443.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d2e800a1e02f52b989cd1d4abed6c5b4/31316361231.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/gepoxowazipugifajulenibul.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b1949e6cd---wepavukifugekoru.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/selemadomisut.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/83710285161.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/plag4p6ouq6b68obppkka5qm35/58140593813.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/damedup.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q63gt7m5aakef5s8mlhgoevfe5/23737314655.pdfIn PDF document text
    • http://tianfonmm.com/d/files/nebarupaxelag.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a398a8709---53461252883.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/2m6r233f8gphjmhppnr950ogp6/rivometodup.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/bazimavesivokejopolav.pdfIn PDF document text
    • http://mamtomchabahai.com/uploads/files/files/54087244127.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/81238977862.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/juboxizom.pdfIn PDF document text
    • https://liffeyartefacts.com/fckimagefile/file/jeposetaxanezitefofuba.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/zofiwazasozo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 17184 bytes
SHA-256: e0027b3436d52a0739cf801033f8f5dee7d438ce751966f54adf7e632a4d8670
font_01_sfnt_off0001136b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B82 10740 bytes
SHA-256: 0a53f2e7606d10cf42a4c1aa10a708745467e9dff7b9dc8d1677d7c7c996c3ae

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