Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd122c0f15675c60…

MALICIOUS

PDF

101.2 KB Created: 2021-07-05 00:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5743f07b303ccba5382f757542e7e13c SHA-1: b0731138a6088056d9887c2fc49dedd160bbecff SHA-256: bd122c0f15675c605dab90363d935514d6e752ca6f005c85f5e6c2449edb4786
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and link farm nature align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160758ff94ef6b---98097511569.pdf In PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/83c0db650bc986eccf2e593189e69d9d/58720037176.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210628_151343.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/10922c63c3d093903c2be9942389b52a/kogomoraselu.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/34rt49rae262q63jt180ldb9s7/82306623421.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/30024ad933c430c97150466fc19fbaae/29977543977.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/087a1bd8ee4d99d5d691a33e74ef66b1/xelukivenuzaliduguxetuvo.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac2a545e0f---buwedew.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/27711491888.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/f9148e79cfde649ea72abf0ea13549e1/raxaji.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/04438864b77a1e0c828b62cdf350a3b0/57440044778.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/56bf5bf717b3317a21f67397d0202c8e/41010139223.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2487978ecfb5ff6e197aa5c2555b091b/24832636274.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/71069793121.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d0da96cbe46f05023b1b1da7d9e3bcab/29343696917.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/feridopaderone.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/gubokewobubuf.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/5c848093c303d5b697a7bee4e3687add/14760569736.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/445c694e5fb36092463e9f0fa4aa26dd/bumejejopejuxetotegusiso.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/girojusar.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d66aaaf34910e3e90d21f1935c807976/54238182084.pdfIn PDF document text
    • https://polandpools.com/contents//files/81202335618.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/9537b92c2ba6838fd9d8e59634b04ea2/jufibej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=jee+advanced+2011+paper+2+solutionsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a915b8d0f39---36582030753.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_off0001270c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270C 10960 bytes
SHA-256: ccf70dab9a98209604d4a8d1b3a893bfbd010e773c473e59f18f22f4f04e8869
font_01_sfnt_off000140aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AA 17632 bytes
SHA-256: 2dc6e454345641c743c9f69b73aedca1e982dfe4e6c3e86156a6333d4f622a69
font_02_sfnt_off00016f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1