Malicious PDF — malware analysis report

Static analysis result for SHA-256 7748af82848a67ef…

MALICIOUS

PDF

88.4 KB Created: 2021-06-29 22:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cddb8b4f2f0dd0c100d76e7a91850bd7 SHA-1: 7910c87c10207055126482b2da41e0209dae940e SHA-256: 7748af82848a67efd09066aaedee79fa95476d986d6c4b6ca4e35f03f188ecdf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af19d47b152---87809259752.pdf In PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/88153501216.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/webesirajige.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/92823eb2fbafd77fc1a48908fc92f284/wovutodinar.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/fuxofiwazatil.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d89c5bb1cff93421c2a6ebea007bd52e/76180554247.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/b1aa8577eae61665132d38f759d7b43c/38844517039.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/046440b09ca0e040884380c366b61428/98598106782.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/rnai6nnsk2crasmf962gvfid0s/79818609815.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/naxala.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160746d5bf40f5---84501123139.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae80032570---lopovumewan.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/wiropiwaporimos.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e172149fccc40892070598268b5d3b99/karulixopopawotakupo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/ditawuxagevusizito.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/17715991818.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948e36ab337---bavixirakofuliruka.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/cdd545f15a5d08f9ec4bbb7602c6505d/wexojifugafuxare.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/200ae2882692ceb91e69e78a7c9cd4ac/jiruwanebegujil.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2880bcd02---xexuxilamikobesaten.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160850d2702ca6---52825581994.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/d20486978edce38fecf8b890ce04586d/13389098978.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/16dbcc3337f44dd1fbb8218b2c6d08a2/89011952312.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/79927980337.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2de5a633dc83e24b227791face42d550/romemadegiwi.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee8910bdb---nezove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=energy+spectral+density+defines+mcqPDF 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_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 17904 bytes
SHA-256: 1d392c79fd7b35db91158c2160788c613541ed0d97898e95b1a96cba0bf102bc
font_01_sfnt_off000120fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FC 11084 bytes
SHA-256: 960a58f3fd02874a39e90d42b8e7fd9e75a9662d56cecbca6f8b26ad671557ea
font_02_sfnt_off00013a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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