Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a12151976b8b28…

MALICIOUS

PDF

88.2 KB Created: 2021-07-04 14:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4a108a98651c447eb361c7c1bf45599d SHA-1: ee8cf59e6c24ada08fff06818df35bade601667c SHA-256: 46a12151976b8b284935f3b1a9b0b99ba7cc9569be6fa61ae33fb3853921f610
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of link farms on disposable hosting, indicating a phishing or malware distribution attempt. The presence of these links suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://smidgel.ru/uplcv?utm_term=clarkstown+south+hs PDF link annotation
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/lalafiz.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/80997644847.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/1pdrggljfvvoejg52ihgbv6jm5/54212204013.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/37402809481.pdfIn PDF document text
    • http://aimic.com/userfiles/file/78403255193.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/25212208348.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91783154168.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/49314129733.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/s24a6g607k9e9re1a7spsjrjc0/41337359226.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986c888b5e0---kuwasese.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160733c35bbd51---41525879921.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9cdae8eba49c8920f50d06bf4d325b00/80086960728.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/rokujanumib.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/68651718500.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf0f2e8a12---33579426734.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/13269406739.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/0653bf3c972ba2e63cc8e88e4f682c0c/zopus.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/munutixeloxil.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/534193eef6eb212feebdc13584a03ec8/rajinonu.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097e7842a7ec---91440724235.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/fc2988e233d6dc5c68c962f9a88c4e62/muzebututekolisifowinizig.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be85e93438---65396825725.pdfIn PDF document text
    • http://aps-mes.com/files/file/surelenetepowadufakepax.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 18316 bytes
SHA-256: 9fd2f845f5a5d760aa145c9fa06e3f54489cdfce66f036a533ae22e0b31b28cf
font_01_sfnt_off0001245b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C72 10292 bytes
SHA-256: 1d74f6467c733690ec8a1a6a8f9c6a9e98436eb83554e603e67b193c3001711a

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