Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0361d0fc15b323…

MALICIOUS

PDF

111.1 KB Created: 2021-09-03 13:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ff42408b13b9547cddc3527f79082813 SHA-1: 34b666d14f099ae9744c2850b58bee6697f951f3 SHA-256: fc0361d0fc15b323e3c3c5e6146132018e9ed477b2ad53515ae917ab2f0e26d9
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 appear to be hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://wastran.ru/uplcv?utm_term=imagemagick+rotate+pdf+page PDF link annotation
    • http://project-lovcen.me/userfiles/file/podudujifuze.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/51277432948.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/66a72c10f232755d9f678db40c648d16/17837507572.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/67676212791.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/gupelalivilerudowiga.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/14259011750.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ff9334d92---7489844202.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fa30140be---63515920998.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/527c5da467392fae19f6682a1c4059a0/88199594999.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae320c7fd11---weforegofixisafumerib.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/jureziledez.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/88492750247.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202107160310344539.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/9t5r37ghnftidrfopu9r51auug/58907088133.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf30ca37f---wiwuvirarerivalupobufimi.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210822_724D8F5C7BA621DA.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/54064fbde05ac44bea70d1999edde082/nifurutojafezobofuxaxazet.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160841ca58821a---82416313980.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/f12f9ab3b7b826782115c90f665e8bb7/68568831600.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/37289331356.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/faguledove.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/fcfc0c28e3965e974888bb8da990f631/fefatipotogitere.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/dapur.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/22591498762.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_off00014d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001651a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1651A 18756 bytes
SHA-256: 6148997eb24fb50a05c14a154936263157337f3580e84179e34bf28054189e24
font_02_sfnt_off00019673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19673 10688 bytes
SHA-256: 78e7776f688d1fa74cbcdb9921bd5d27ce3cc8d428e46668490bc3758547a25d

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