Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c516b3310acf08…

MALICIOUS

PDF

102.4 KB Created: 2021-08-18 00:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb4e1824ea6fdccaa4bcd15d6d13226e SHA-1: 79291455048017181117f916d66a58a0567d2d31 SHA-256: 97c516b3310acf08214fb88bc6af1dd3df5d97ef552a07f3c5e370829cded92f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL analysis suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://alimentosldm.com/userfiles/file/169278542.pdf In PDF document text
    • http://fitviewer.biz/files/file/selim.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860ee4f141e---66248571598.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/kovepowekid.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lulanozuzavukediv.pdfIn PDF document text
    • http://deauville.ru/files/file/kugabumakebada.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/21306232519.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/2m7uhoc2rtj9d27hss9ob3b4i0/rugawovodamizugij.pdfIn PDF document text
    • https://eslms.com/userfiles/file/dibezo.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/53025786216.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/gebuwipuwatosixilamo.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/00c55abccd262aa215e6a6f13d38d93c/94645557154.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/xenuv.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/tojejavuxumapudobebe.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/nefip.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b5091dd71232aa82e046e490db8897e4/siwusijigipulagufafemakiz.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f81970d63d7bbf03edfcaeddaed22a46/gesetekavaxe.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607e66c870939---jalanu.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/gized.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090a93a2c5c5---73346551068.pdfIn PDF document text
    • http://anpo.vn/upload/files/piwekorutekuzur.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3423a4b056392eff48e7ee6c334992f0/katapabafafo.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/21581782261.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/devunowexafesevam.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/diridikulajujexu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+apply+online+punjab+policePDF 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_off00012c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C34 10660 bytes
SHA-256: 069a24646c9df8894a33194f165f264a40a1e93abfc359f4a1fdf3b57abf9ee9
font_01_sfnt_off00014482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14482 17500 bytes
SHA-256: 4687564fb5cdb501a9998120b3d82e39782fb1f065c10908f3ebba27412b7fcc
font_02_sfnt_off0001728e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1728E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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