Malicious PDF — malware analysis report

Static analysis result for SHA-256 7006fe563a423ecd…

MALICIOUS

PDF

105.7 KB Created: 2021-06-29 17:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ab7600733ac0729ee9a3afb4e099905 SHA-1: ee47d062fdcdc4eba100ea3af34a3c3c6655c21b SHA-256: 7006fe563a423ecd65e712ea2f92b305049e3f07a0797397197d0a673d0233d5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://alihuata.com/userfiles/file/zixop.pdf
    • http://curry-box-deluxe.de/userfiles/file/mosanugin.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/wemuwexowabogeraxetox.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a92b403ec62---95630053707.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608533e437d2a---pofesawovufowalikude.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/fbe6f1989348f4b200d82ff86bbaba81/jamazalobigowudanugane.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16070607f85153---23886801721.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/43616172232.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/508cbb02168b849770471e7d34737ab0/zifapewizisinunoz.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609847fb8bd4f---82434616878.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/bp9nps33uugkafov1sv880gk78/favoxugexotuj.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/pgaat9e6u4kav0dn5trrutevjm/72939121327.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/a996htt6hgrdub36ai58fniibd/xoxudavenemukodogakan.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb33be4dd5---11120321061.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/hefoc3vv1reqpe903h39su5rq1/74801378826.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16c4e34d---nimipusegegenaxubizijez.pdf
    • http://auxerretv.com/content/public/file/zapisino.pdf
    • http://sibmetiz.ru/upload_picture/29978481136.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae2bd6844---41532110357.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/951c6b1387d4c97c941f910aa4b6850e/lisaba.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f763968265---kotagilulesawevidoxep.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802e8de7e22---28144913530.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=amboss+aortic+dissection
    • 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_off00013cfc.bin
04db3f302ee473605bf17ba060cebffa09c159bff718a10712fb3bba8c357083
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFC 16996 bytes
font_01_sfnt_off00016972.bin
8108e1f8cfe41d3bc08db93416488b4f3fecb46b3e933366b1ce106e9f444f01
pdf-font-stream PDF embedded font (sfnt) at offset 0x16972 10604 bytes
font_02_sfnt_off000181b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x181B9 16792 bytes