Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa15f346d9f329a…

MALICIOUS

PDF

95.6 KB Created: 2021-06-28 03:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78009ec257aabb25c87e2a521cd2c160 SHA-1: df5256adf674e4ac22eb2e3eb5c59add4a90bd36 SHA-256: 2aa15f346d9f329a91e9bd71ce72aebf25b0e76c4c4287bf4b65b1d630ca5e7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with PDF-based phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://ketchas.ru/uplcv?utm_term=hawaiian+girl+names+and+their+meanings PDF link annotation
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6e8eda38ce42160992e79c2e2994ae6a/50536520254.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/30944907607.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/86549441203.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4937443f7e---29385643367.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/97389434581.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/ridazinufirabiluki.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160859dfbb8ffb---nipumijelajajoroget.pdfIn PDF document text
    • http://beiks.info/public/file/15788441252.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c21d66ae34a---84168469798.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/5dffa354b899dfd2191af895a8550df1/kaxajimugexipija.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/jimagejas.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/8bc2f7c65e30cc1324a1b1db9ad6220e/wegubeluweva.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/tunanulezaso.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4241cdb6ab9e99ed8e3220b129421a7c/ribotaxat.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d91ec4edc1---dasojunawulezurome.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/moxasodenunuju.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16088470d47df5---12047974408.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5c508d61---99875824322.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/bafefuziferivu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607210648bc2a---82727227669.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20b5de71c3---joropadalevajutubovumovoj.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f3faa501c---golikapugudiwoxagufewagi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5c8f3202---xokomifakuru.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/dd46bcaf1120471780cb62cb6447f70c/bimijujobigu.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/t3e09gnfvs2gealb2bpvhjjd4l/ninusagakotagov.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/27077127406.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843f4e5d803---78581523597.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_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 17452 bytes
SHA-256: 8069696d10dc657071d8cdffdb30435efd7ad5e93d79953b04d6f2cf908238be
font_01_sfnt_off00013f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F38 10652 bytes
SHA-256: f875f77fddfbe4f0efa66203c5789bf4d21e993e2e8b9a2f7f75b8404a9cddad
font_02_sfnt_off0001572b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1572B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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