Malicious PDF — malware analysis report

Static analysis result for SHA-256 de146a13710998a4…

MALICIOUS

PDF

86.0 KB Created: 2021-09-07 07:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c7f4dfc8e72c0f69a08c5653f16c0850 SHA-1: 53c5da771d882d8ad05c1b062b10522b668be515 SHA-256: de146a13710998a47dd55dd8f5e8b0c19265fd5b3113e97fd1a6a51242ffb67f
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. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, many hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://arohitourandtravels.com/userfiles/file/zexisabamoxebe.pdf In PDF document text
    • http://www.sport-konyv.hu/userfiles/file/86914727742.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/pekerubizijew.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/93284248821.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/euue6mucvk1upfqqa329ndo9b2/52267288558.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/jatuzarerililupa.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/33613881136.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/jt5of10rusc46a39u2d0he6ara/89958978569.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/59314073334.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/jikoxibujotumiwuxape.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b159a8063552cea47c3f15a89fa329b2/pinox.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/84029049335.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/81497603775.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/26630468474.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098c102543ff---lawoketiwolaruzamota.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lesabi.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/28709759324.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/36203551496.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fed99743e9---98225585632.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/2e3986fa3116e14110af6abb4d11f4ea/49963793981.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6b7592ascfne8jqahv1ad23ku0/kababowimowilukeberamuf.pdfIn PDF document text
    • http://cosyromania.com/media/file/8615727178.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/1c9ecfc8d496df35bd76461d1eaf203c/25130430585.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/tokoworunefepi.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/82529965922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pioneer+djm+900+nxs2+manualPDF 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_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 20088 bytes
SHA-256: 0b24ec375ed4fd1ee2272d336cd969baa7301fae3d45f0bbb369d7b81dd5a526
font_02_sfnt_off00013130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13130 11052 bytes
SHA-256: 8317009c59c44504cd4f74038d378cc0f03cab3f7220e63fdec9ab157d21ff5e

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