Malicious PDF — malware analysis report

Static analysis result for SHA-256 be09eaebee037737…

MALICIOUS

PDF

98.8 KB Created: 2021-07-07 06:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eee2e6fc5d7e5784c0f023fa81f23880 SHA-1: a2c03dc54780e5dd7cf538aea1d76cdeeb260d16 SHA-256: be09eaebee0377378d756e6b5534654972f5dab43d43820d033796efcb3dc717
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs suggest an attempt to lure users to potentially malicious content or phishing sites, aligning with the characteristics of a spearphishing attachment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9872

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 http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/651befc1e76ab6f08e5b2f916d13fcf9/sivagib.pdf In PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3ac33ac3b7cf54d18b4ce0abab18e1da/84607030056.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/f061b49a69e9b2b99111fa2e4679738e/60476897777.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e1607981fe7---74084512170.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/72989793476.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ncer5iq13rd238r9q533eg7ja7/90407576006.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/de86ea6588a8ee9f7e844090e2a47297/7468726930.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/77482790616.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6ad7a7b0b60138a97b6eaf1a10d45cc1/38503152108.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/zaxojivevi.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/48707602689.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/nbj6blmqvgh87fhshm1n7pnsjf/peladuwugonaduf.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/92207988187.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/3291809973.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/06a934daa5e3ea2093baf5b96b932ae5/rorawofodolorexu.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/a6a3c8f8a1a4c5091008f6eb2d963fc4/59190216088.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/xakijiwiz.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/85607513462.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/pagesugesuxelusis.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/nosulo.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/6mn67f46r21lfe0gobmqdkkgp1/27024055418.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/rve46be5ii3erps8ckpt14t6ch/womebanifeginatabo.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/80061124235.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/jubafupinimuvo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9167527cc---78393690245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=cic+citizenship+processing+timePDF 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_off00010896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8
font_02_sfnt_off00013614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13614 17856 bytes
SHA-256: d6221ead4e4577efa2600b00373cd3e0a33fee2687bc72eb1d53b47adc1a4167
font_03_sfnt_off000164d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164D2 10704 bytes
SHA-256: 4294a02ee28c4a0bc3e3ff2cecb0ca2141f194e2a51ad2aac2513b214f6c86b7

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