Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32b807fff7385b9…

MALICIOUS

PDF

87.7 KB Created: 2021-09-07 00:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af5abbb0f3717de7439b48cba19a9bb2 SHA-1: fbb926a87603c729aa226a2eb687cc67f1ec5898 SHA-256: d32b807fff7385b941f9a3e27fd97b3b493539d8e9dcf909942636e9883cf87e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristics reveal it functions as a link farm, directing users to download files from compromised WordPress sites. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca19bc78a7---vesunuxol.pdf In PDF document text
    • https://elnativocoffee.com/silver/upload/files/verutafejuvagomes.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021081006452294.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/2af2119b8449c29c597fccecc57eb7d6/dimij.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ja25icektfekif6rhujg34ci74/wuboxo.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/kesipaderu.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/77923039000.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/gapezet.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/17348433fc9959b3d8513dfcf09c14ba/78122090553.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/2212d96d35aedb10e7aed2c280b19220/lobilitinozijap.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a42725279d1---nibipuruse.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4b8e024e0---97964515051.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88594dae7---sisipijodafiwixowe.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/5002606528.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/jezelus.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a631386ea63---jamezazemipunalidivu.pdfIn PDF document text
    • http://bdn10.cz/files/file/paxejif.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/gevanumixaj.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/qo9h4rrsiip2759naftmjt55p1/97585165487.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/673fe017282f48a18e34aaf3c11c323d/52819003873.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210703154843.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/madek.pdfIn PDF document text
    • https://csodamalom.hu/files/files/pazozafugukafazaveb.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/59178552184.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/nuf0iv7ipguda0opmliuvfqnf6/46984036399.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+de+manual+de+padrinhosPDF 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_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 20696 bytes
SHA-256: 86b6b5d10e3a36354870a3a4a7718c769c23bb5992d2b7ce66f7ec74336c83d1
font_01_sfnt_off00011ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF0 10744 bytes
SHA-256: c3be9b0d9616dfdc67fb5704cc7fd7ed899d8d8bd6ee2130bfedccfb59c9090e
font_02_sfnt_off00013769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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