Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eee47ee0f8458b0…

MALICIOUS

PDF

70.2 KB Created: 2021-09-26 21:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f1730c1c525f06f50ac2d6f388169de3 SHA-1: bb6a925c7c176c6bad0acc506d3f90662a5b95eb SHA-256: 1eee47ee0f8458b07067606331c3119a115652fd7a5b6b0c24f12a38d16d7c64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous links to external PDF files hosted on compromised CMS uploads and disposable hosting suggests a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly indicate an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://brahmagnanam.org/fck_uploads/file/90428133163.pdf In PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c3a1a607cd224a0e696b81a89a63a874/2176692395.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/sekezoxajegip.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbffcc647d---govuzezorigezegig.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/wigemanavew.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/poxonujajidifekavizusipor.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1614ff75e00d47---94302839666.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/41544739514.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/gujanodajomu.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/bekepev.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/nurosulogazagezurad.pdfIn PDF document text
    • http://abworder.com/uploads/files/sanumenepizadadidawake.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/95612500637.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/85189473902.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/58500953209.pdfIn PDF document text
    • https://atlantidegattico.it/file/runawafotidegovogowa.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/joxawuzabugulitidutagozib.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/5okg8p3s3ln0r7pf63alv09lm7/96698326757.pdfIn PDF document text
    • http://dytac.hk/userfiles/rewivimemaniwupoxef.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/notubivejewudogu.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/77126592831.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/61724397920.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/pejananarulexobibiketam.pdfIn PDF document text
    • https://dacola.com/upload/files/pirimirosaseguvanikuxonef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=biochemistry+by+satyanarayana+pdf+free+downloadPDF 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_off0000b351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB351 14640 bytes
SHA-256: 575e838bee00130c3847c1dbf120e34f0b4067c75dd4fbea361206e966fd605e
font_01_sfnt_off0000d842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD842 11276 bytes
SHA-256: 6b08618cc9c5be02c50845809b20cf8c374a73740c1b946e2c3190b09940cbd1
font_02_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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