Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f7bc8752ff95af…

MALICIOUS

PDF

76.1 KB Created: 2021-08-07 00:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 481ad4aa60f79c580a6da53af969901c SHA-1: 7d7a024fff9b536be687849e7a1460fce783f5dd SHA-256: 07f7bc8752ff95afa405f39d08bf087506abff3a86fc181fdfa1aba9ca4c14c5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with several URLs pointing to compromised WordPress upload directories and other potentially untrusted domains. The primary attack pattern involves luring users through a malicious attachment to click on these links, which could lead to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://nirmalapublicschoolerumely.com/userfiles/file/93500137650.pdf In PDF document text
    • https://lawina-radom.pl/files/file/beledosemodono.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/zokobegi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ee49fd96---lefitevolinu.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/jatafuwup.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/gajerilulo.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60C6777BC1B37.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/nabururemalawesaxazigilu.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/naninusanukubafujoweb.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/mekifalelutox.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/3h3lgu2t9gt7k2gv4c9lfqh681/somukogenifesozen.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/75093083894.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/kinomaruwapetesol.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/15912712210.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a217755c447---59431918346.pdfIn PDF document text
    • http://uniqueaddress.in/crm/files/nanerarebapirepomubufa.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/80525350823.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/wafotukadukuw.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/ee242ffd80018065cb4703fef775c8c1/puvolepomokokogatezugorat.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607107174339e---pisopapilizuzuletat.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/76734126069.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/bebobem.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8b2da60b---gifugerobinapodozom.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0eb36a00d---pajagogatimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+repair+battery+at+homePDF 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_off0000caa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA4 15412 bytes
SHA-256: 5593dd14b17685fe945c6b4e5aefa0b532c0086ec297b91dc9f6b39eeb6ff389
font_01_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 10528 bytes
SHA-256: ee74272ac6f4591cc4da11482d7edf482cc54aa5090c999089d115b85ad9a038

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