Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94de0bed68d821f…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 20:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3c25bd3f1394c3a505f130cadb7bf77 SHA-1: b58b078ffe0181800e4b87404d3e8d263ebfdb37 SHA-256: f94de0bed68d821fb6c30e72258d080ee3c2a6dca804c6a8879cc5732cdf9d90
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 ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains hosting PDF files, likely to distribute further malware. The heuristic firings suggest a deliberate attempt to obscure the malicious nature by using link farms on disposable hosting.

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 http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160814fb89f353---tasemekevonifamezirezup.pdf In PDF document text
    • http://peoplefoster.com/pliki/95413166156.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/1305414054.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089407520ec6---guvatewawevo.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/45219852819.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/vedebedokuw.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850becb42e6---kodafopedamororoxibeva.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/83331470480.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/97286703717.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109010730256465.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/riramad.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/6766416871.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc7611f245---bonujubenevimomejejiguf.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/79652109063.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lusonagomilogebesipodev.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46e8e1b40---57767501111.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/8fcae0c680a57219ac1f523d1a657f75/30001446312.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/50985981888.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/nuxulegi.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/95018018980.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/39200075016.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/tukop.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/8cfa0abfefda813cc36c31d929bbadef/tetulepebuj.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d056797f8---86883786704.pdfIn PDF document text
    • http://meskerjager.nl/media/files/sibapiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=a+red+letter+day+idiom+sentencePDF 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_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 18192 bytes
SHA-256: 0e747cc77dc3403325b0296e2aac7a7149ab7d33094a7622dc4729525088f850
font_01_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F4 10628 bytes
SHA-256: 6d07d00fca1e04858c53414d9b165952b23d2dff893c7300a3bc991545a4be34

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