Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8e00be803dcbb5…

MALICIOUS

PDF

87.8 KB Created: 2021-07-26 05:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0d333e3e320f5d849153cd057ca01918 SHA-1: 9761be9273aefe486a955919606a9b2d270da638 SHA-256: 7b8e00be803dcbb54255f4e5917a3149d69f7514dbc4f825234f8adc1ae22672
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 functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on compromised CMS uploads points towards an attempt to lure users to malicious content.

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://businesslife.com/content/file/gukuvatovif.pdf In PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4823fd54cf---fukoneb.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/finosonuwiniwobas.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/e282d399b2c0aa5d13ca1e4376659a82/mimox.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/f3r0ql41jbhughuop643ohulu1/mowedonoluwofil.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7467b3ffe9c34e41cd71e26893547395/50199780021.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2334f500205815054593a7645124921c/tisapiji.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160995128930f2---vodukate.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/81aa7e794708ba970dca48b4994f33f3/55870071827.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4d462ce1d---bofemofuxezobukilogebijav.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/ziworurisipatiwo.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/liboxizipofe.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/81237134103.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/56223051937.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/60042ea3c1900cbb0dac883e8520a821/25645618539.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/18307070179.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/66500335607.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/d87fc504070c447b4c534c63b0b0d2ca/8499352024.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/6dffcecb936b9c11d0ad1f9976dc044e/fajivexibavob.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/87649659126.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e36668fdb---84099992674.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/xakipiloluvifiregewidex.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021061916055073499.pdfIn PDF document text
    • http://alkanboya.com/files/file///pokejofozebixatekajetofu.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/lokolanakezobi.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1as2l4339d5s9co47nuioshobv/88676467504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+street+fighter+4+apk+android+%28for+all+devices%29PDF 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_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 11380 bytes
SHA-256: 8ab23ff943a3ea358017bce4aa1cacac20e85b8754bf4481a818322b438fff8b
font_01_sfnt_off00010a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A84 18736 bytes
SHA-256: 3cf86b80614ef70e4401d6008819e9f948c1804b8fdc7c81cd82d4726dd49610
font_02_sfnt_off00013980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13980 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.