Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d03ef10635bb9fb…

MALICIOUS

PDF

81.6 KB Created: 2021-09-12 14:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 37188469e6f3da48ee3187d09711c440 SHA-1: 32cbd89d3412050fd888f1370732d3d0a8ca443d SHA-256: 2d03ef10635bb9fb3a0081f0f4d986251a8a0cd563aa0d645473b2dfe9537906
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a secondary malicious file. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports the malicious intent of distributing harmful content through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baldonimarcostudio.eu/userfiles/files/xofomujepabek.pdf In PDF document text
    • http://unsersohn.com/images/file/39874560658.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc491172e---56525773315.pdfIn PDF document text
    • https://baptistfriends.org/media/rizap.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/96660148148.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109060035248045.pdfIn PDF document text
    • http://svb-volleyball.de/userfiles/file/nefujif.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23307533385.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8a9b978ee---53631244877.pdfIn PDF document text
    • https://raljob.com/userfiles/file/dekazosizovogiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130433660903---62564760331.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/76363934539.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/33475750824.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jijopususurojumagutejo.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/95404856278.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/96766680185.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/43276776815.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/sukiverufeguvetoxebomite.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/jafipili.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/ruwisufebizop.pdfIn PDF document text
    • http://sbairs.com/datas/files/gudamudetoxikovuferigoti.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132369a6e8fb---nefabutonoxifemezafa.pdfIn PDF document text
    • http://lecostationery.com/files/file/nanafagitojutixezuluzig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=hacksaw+ridge+full+movie+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_off0000da0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0E 11056 bytes
SHA-256: 48b20a46f81164cc1a3bd0dc48152fedfbd3ad79daa0982e9ca054320038221d
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 17364 bytes
SHA-256: ca6a7401a2f3b9d2d30a8814a1ad722381137123770622f90714cb302a56c61f
font_02_sfnt_off00012082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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