Malicious PDF — malware analysis report

Static analysis result for SHA-256 921ae463b8134693…

MALICIOUS

PDF

83.8 KB Created: 2021-09-01 05:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0ba6c4681395779ae9812e4d9b46c470 SHA-1: fa971dff7d0c3eee6c9616deb11c0b33a51b3b03 SHA-256: 921ae463b81346932c0da4a7e2758e2b87425575f6db5496addceaa345ea1c84
164 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous links to compromised CMS upload storage and disposable hosting, combined with a visual download button lure, suggests a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific content or instructions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://infosantiere.ro/userfiles/file/45697646440.pdf In PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210602073729.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/69543040792.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/jminoqfmkfktsq5kjegulo5nvp/xasegogovukose.pdfIn PDF document text
    • https://masukpt2.com/contents/files/ramumaravorodotozepaxu.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74e3db86ba---komorikarijunipibiruwoxip.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/dbc4196d877e84db53d9da5f6cf8bce7/49639599409.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/4951376783.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607032f4e4cf3---ranitelujokawubonos.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/lolipuwawer.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/30407200416.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a84d3af6e---dulidulemoxizokozetovit.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e4522ed8f---93049967325.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/xoxixak.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41d208679---58377642303.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cbce26b21af22c736d15d8c8ae7a0af/90310131855.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c0fb6a017a7753c1b7ea4346f6a69b69/52617317882.pdfIn PDF document text
    • http://totoumi.jp/upload/file/58160737080.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/ladamevutamis.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/jitulekovikiwitipop.pdfIn PDF document text
    • https://aildf.in/userfiles/file/gadobevirinobabiloj.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12821896373.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711810992f3---xaxavivutaw.pdfIn PDF document text
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/zekenofeterudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=previous+year+question+paper+social+science+class+10PDF 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_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 17556 bytes
SHA-256: ff3832b3261567deab4d460d94bcb585aa176c5c01d0830fe79bfcc008e8ec88
font_02_sfnt_off00012793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12793 10968 bytes
SHA-256: a0ce33dff789544caa4215058eb75068d6e4f5601bceadf6fbd3e5c45cd94075

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