Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa138e5f74d759fc…

MALICIOUS

PDF

76.9 KB Created: 2021-09-06 02:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 877efafaba5adec7ba563232e5f005e1 SHA-1: 43668bd96e533473a174fc585cafbe43bc50a53d SHA-256: fa138e5f74d759fcc50029f42beb937fbdc1a8f917ad9b7dff6ea3fe4f37a5fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a link farm and contains a lure for clipboard command execution. The document's content, though heavily obfuscated, likely instructs the user to interact with the clipboard in a way that facilitates command execution, potentially to download and run a second-stage payload from one of the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://519pf.com/userfiles/files/maripelutabu.pdf In PDF document text
    • http://barudan.hk/UploadFile/file/20210725210320158.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/tukuwekodipofurisivafaji.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/16560822606.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/83687443721.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45cbf9ab8e---viragulofutarikodel.pdfIn PDF document text
    • https://cheesykeju.com/contents//files/40699780885.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/39863198081.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/6395998607.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/fc0a1e9a036173c1eb54a4670f339d36/fejubutoxogukigej.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/zawaxadibugoxonajelix.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4bcaa90bb---fadetekuza.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/57f69f29f207fb621975a8ba40d8c588/novevopigalewisagevapos.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a51417f3---90806373139.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/022a5edee9b4ac68b02a0556385b5ece/26633531068.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d38b1633bc96ff63f9b4a652ddb72c60/45627144319.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/db03ff905764b48ba4fc09a16d69e88e/wexetizabiro.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/88526000268.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/rozama.pdfIn PDF document text
    • https://hssanesteban.cl/files/fizinujuwe.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/a603534251fb8e2a145a1bd25adaf2c7/11242123713.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/67799342264.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69703d8bfa---dufisidusavitagujomete.pdfIn PDF document text
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/16387453982.pdfIn PDF document text
    • http://ned.ru/uploads/files/86861731960.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fpdf+para+php+7PDF 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_off0000c843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 18460 bytes
SHA-256: 17d8417bcdc33e1b56514cf32cb25283b58e9a09fce896c8fcbde268a74c9e7e
font_02_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 9864 bytes
SHA-256: ab8c14fa4183d6f81fcae3d79e6c3c729d37662b84e249f338d5829ff1dfb39b

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