Malicious PDF — malware analysis report

Static analysis result for SHA-256 204397a4770519f5…

MALICIOUS

PDF

90.9 KB Created: 2021-07-24 23:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8fc1b888ffa995c06f30a60745b6a413 SHA-1: f685d5127e3d4cba3428fcc161770b40c651cf82 SHA-256: 204397a4770519f5f4d617a2d402dd765492a53a90e883430a70c7e34ac41942
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The document body is unreadable, but the heuristics and numerous embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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://strategieb2b.com/userfiles/file/fobilazugobisa.pdf In PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/sobajegupuwole.pdfIn PDF document text
    • http://i-dron.cz/data/file/18563501656.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a891d13a1a3---kebosolozuxudijafobib.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/vepupudidoliwemeku.pdfIn PDF document text
    • https://sambelteri.com/contents//files/jarolidanifafesafin.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5b5283c38---tisusiwojodoziwuwepuze.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/69879184483.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/e93bb50e8e5ff6458641369f82ed950c/kejefajukivebakagotimes.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708a1703d36---nefavamuxabi.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/76623791651.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/ruzoretuxa.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/9lv15t5htnho68oa4jc6nu2ech/27910911641.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/vawezepevibemidutuzux.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce1bdf275---ledezesajose.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ba818f420d359c55c68c72d3a437ebdd/pevutikigibixukaleroxu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/0767781a4bf66ace24e61be0545c09f2/69890289316.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/87751450067.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d5682dc608ed3c95f37a2df6e975a5a8/49646424908.pdfIn PDF document text
    • http://modern-pro.ru/files/file/vevezazejuleresaga.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/detaxazuwabixevorofojifu.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f6687f307a2---5403082177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+much+is+dan+price+worthPDF 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_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11860 16496 bytes
SHA-256: 92ad712c2606573b80323442e8279f3065c8d8757d40fa90828b669f22fdc73f
font_02_sfnt_off00014353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14353 10912 bytes
SHA-256: befd620d56cb73bbcd492b6dec6a070d0c07681689adc8650558c143ebff1de3

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