Malicious PDF — malware analysis report

Static analysis result for SHA-256 01803f254585edb5…

MALICIOUS

PDF

81.1 KB Created: 2021-07-07 20:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 67512737ce9c2d8ba4c48d50af41020e SHA-1: 60a0bda715b4e41ccb724233c59d141912d847a6 SHA-256: 01803f254585edb5d89af470663c93248cd2edc5c8e4f0d845939c0e26bbd9e6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body was unreadable, but the heuristic findings point to a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/f0d8553f99c76bcae28146e47dd38ecf/lilewamidamajizaxowexa.pdf In PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/hbkjuokpkl3ulneo5sgc7uf9q5/32798359243.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16077643daf8e3---dafuwugufadegib.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/653cdd686ff2142decb959cf7768d8bf/83987133506.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806d1315884---samepamaset.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e61c5b10---wavilebefulolavileviw.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/39515022417d359751810d360cf9f8ee/5981348132.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/mudezuxisu.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e087596b70---37573770866.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/87320337595.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/59692652863.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/h263gofhqlbm883ig24cspho21/29726909602.pdfIn PDF document text
    • http://texmet.pl/userimages/file/96122912296.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/24729553301.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/b5dbf98aca2593390a16c8b2c9ecf4d5/29935076138.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/kobasoxogejawagodalupub.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160790477befe5---39770219262.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6bcf6ed25f719040557cb2ff08971083/79803912978.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/78023995475.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766271aa3da---fopububajusor.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/516d4c14ecf7e2fad2846d3ac3e6299f/tepiser.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/zepakuvisanexitod.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f39e213d4df5f8a53518d940ed4518f4/zetupaxokomabolaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+sum+of+an+integer+and+its+additive+inverse+isPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 10884 bytes
SHA-256: f482ba61ba52b6b85944c6d4a49c31db8f2e42c4e710cea20e84bcd831127b52
font_02_sfnt_off00010847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10847 17716 bytes
SHA-256: 3f9f662be9ca9e7c2ce54eb509175514dbaf33cc3f94de8f586b6831d8f9cf06

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