Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dbb75178d701f7…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 00:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f95fc3c02f2f79d9820bb51b56f97da1 SHA-1: c60c32a49323156d2a17fb5944532d843ffbbef2 SHA-256: 48dbb75178d701f7acf4729af44deb31f877026a4b441a8ce9d08fbb1f6c6887
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of JavaScript and the exploitation heuristics point towards client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://clumba-indoor.ru/files/files/fipefatizomipoxofopuxi.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2755bc467b---juwukitofusodegiber.pdf
    • http://amirafouad.com/uploaded_files/file/jejojixij.pdf
    • http://abacusnancy.com/userfiles/file/soleparebivona.pdf
    • http://accessoriesunlimitedinc.net/catalog/file/bototosowijidoxifa.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b256c88d2---28854821367.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/q7bcjfgg8moff9b76iu7747423/5942834396.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed28039cd5---46443092553.pdf
    • http://absolutelyneon.com/userfiles/file/57116942071.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608570748cc6c---99124391765.pdf
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/66705518231.pdf
    • http://grandrosso.com/js/upload/files/powovojarepu.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bcae0ff1b07---7252315904.pdf
    • http://parkwaywest1974.com/clients/861606/File/gumegepamuga.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/njj9k1m2dg1v0cmd3bk0enqlet/valovurenewa.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbe14eee08---41511800842.pdf
    • http://jonmechina.com/ckupload/files/tawukufofov.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a28c3272b54---safaze.pdf
    • http://narcisse.sk/editor_uploads/files/gitunasozizamevem.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/dcubljamni2973da5kjv4eff23/vawej.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/o677vos66vvq2sqseianj691p2/penirudowaxun.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071493d7c527---16763828246.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0afeecc4f---40388276891.pdf
    • https://sweetestspaparty.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=self+respect+is+more+than+love
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef01.bin
d9c190437f01a5e5cc4e4385539314bcfcd728785cb806e8d727ecb2fe43a5cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 17156 bytes
font_01_sfnt_off00011b81.bin
68193ee65bca64f6d8478bd80acdd80012f2886c43032b3d8e5f4647b587bb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B81 10888 bytes
font_02_sfnt_off00013480.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13480 16792 bytes

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