Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e6fdff6d545656…

MALICIOUS

PDF

193.6 KB Created: 2021-07-18 08:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ed6365eb72e40cfeb79f1fcd30a020b4 SHA-1: a57959d9d2dcb4ea1d4ab94180c83d0b141aac90 SHA-256: 93e6fdff6d54565625ea2eef9da1febfd80e64afea346d4700a9242265a08d67
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristic analysis revealed that the document functions as a link farm, directing users to multiple compromised CMS upload storage locations and disposable hosting sites. These links are likely used for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39e3373db---17558765844.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ad459f2f---81481351050.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/78401312223.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/mokubinusajiriga.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607580e6928ef---25057591051.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/90462250287.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a786fd3da1ae33090e99736e7092261b/10161360525.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c778c556bac2175e1e11980479e7da39/62752302996.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e952ab797d---21676968024.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/0vokq7rf8vvbaie1jsdfatufkl/rejowudosagasubisu.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f9e224cb6a9af0fb0eb860f619220692/21329365273.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/dizimikexuzerujovetarine.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608141b9e6610---galivop.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/638e4c40cc13a329aa6a3161bd39e08e/muromipopefesaxidujin.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/6866b165d11c4935648432ff5f55f4e1/bikababolop.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/516cecf5fd7eb84dcc7410cb38c46f09/53556733224.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/b151sqinuthi6b48svjrjubh22/vurovalulemigililakukize.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/vufomow.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/popidozedojiv.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a7c7e544---12853577634.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95f3838b0---firokaleboluxemufodovifuf.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/4dc1e48294ad474c047a9f902007e6d7/35796854579.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbd1c6567---vanafofumixevulowaralej.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991e2aa2c09---61013171530.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c427650b---78231969300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=matthew+scripture+about+worryPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26BAD 10752 bytes
SHA-256: 574f83cfaaa5c02042daf723b516dca39a9b4e16ed735b77348f2dafaab1f64b
font_01_sfnt_off0002846d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2846D 17244 bytes
SHA-256: ad36b4a36e18a9c0e0d4dac8556f3c7833dcd79b798fe2b84d04f064023f4c7a
font_02_sfnt_off00029e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002b634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B634 30620 bytes
SHA-256: 27ed3d57954899565a1be46876738ca2d74e758410e53a320cfe88ebf16249ba

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