Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cb22d5f9603b3f…

MALICIOUS

PDF

97.6 KB Created: 2021-08-25 01:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 050160b803ae63955d06d3489938a377 SHA-1: b5ad08feb7c4dce870739420568ea2978ada9043 SHA-256: 44cb22d5f9603b3f1343a5d9015a0ce22056a1d78592e598c5ef5a6fd82657c1
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 malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple links on compromised WordPress uploads and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/p7drbtss0gqn7dlc12auo4cgo2/48912126662.pdf In PDF document text
    • http://ankaraeksioglu.com/resimler/files/ziwivawi.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/ad9795c4f59c445ae910bf8f66022de5/28654778516.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/c6emlhrra5sqcinc7afvovkns2/kipetakenemuvijujilu.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef810d5125---pogopejejovuwigiditil.pdfIn PDF document text
    • http://brukbet.com/user_images/file/3304630247.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/12f5b76d24008e5d66ea2ecf67ba0998/402229178.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/fetirekovorif.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/29955248894.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/39f28657679310385df75faa1fa81174/67900978067.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/xalamubujafowamasefubowaf.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/61459000757.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/47700310354.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/fb7cc4c1074f6b106af8caec9f813964/xevikuzexivasojuzikibuze.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/migajakivapovefiwana.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://ruihuitax.com/files/file/34836429074.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/36673402813.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/rkictqfqg53cuf0vlrvirqenco/98838060939.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/27880000103.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/wojejaginub.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b821463f848---23909166025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=introduction+to+ordinary+differential+equations+4th+edition+solution+manual+pdfPDF 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_off0001161b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161B 17776 bytes
SHA-256: 61641f55e8905f8be83ad4e09812b1b8333d679a8b44347d409d48ce9c36d3f2
font_01_sfnt_off000144bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BC 11276 bytes
SHA-256: 48c724364072e146c31418a121f8c5e62bcb4af5b804cd073156c9a0f1c977fe
font_02_sfnt_off00015ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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