Malicious PDF — malware analysis report

Static analysis result for SHA-256 967d9cc62f0e4e89…

MALICIOUS

PDF

102.6 KB Created: 2021-09-04 07:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 52c432e3219882c36128f3effddf5371 SHA-1: 57e01d810f4c287824316dcdd49ddf76dfd131d3 SHA-256: 967d9cc62f0e4e89c22db06fdd572a9dd299de8529eb27cf7904a36a92b1e8a6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV detection. It contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for phishing or malware distribution.

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://ketchas.ru/uplcv?utm_term=cressi+goa+manual PDF link annotation
    • http://thedreams.cz/files/36201512994.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2ef2358b3817c4783aaef8d228cd3562/18642187377.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/57490352796.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f378681b3---koroxalalepevogu.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210716_0BC744B3DF75A52B.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/79824213309.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/49756467010.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/667976r1jpu23ke29hlvmca6ik/11962461452.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607507eac62e3---baluvurujonexozug.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/90955225976.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161120cc74197c---jidawu.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a31826f4095---kasegubizu.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/jepepulirudijipudud.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dac439004c---23247511580.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/315f346de21c3960f38ab9208d7bca32/vorawarapobifadul.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/92689534262.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa67203163---16188535148.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/gubakoxomakokitemomep.pdfIn PDF document text
    • http://grupophi.es/uploads/files/tubogaxuwugixinul.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/dacd6c9afd18b87a41fc2591a6259dcd/jobomiwaneni.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/61084414753.pdfIn PDF document text
    • https://5udua.com/contents/files/murobijakor.pdfIn PDF document text
    • 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_off00012707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1E 10484 bytes
SHA-256: 252e7c509233214c947af1fa93fc16b5e52ea575d9c23bd02ab60f870dfc0159
font_02_sfnt_off000156ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EA 20180 bytes
SHA-256: d140952ffedebd8a11b45f76612eebf897da057bd948f6709e1e86cb297e7d29

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