Malicious PDF — malware analysis report

Static analysis result for SHA-256 407c0f2615b72d67…

MALICIOUS

PDF

82.5 KB Created: 2021-08-13 19:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7fb51f098251dd47580abef74d516a32 SHA-1: 0cd6ce3e22734dedaaedadc1be4f93a7ac183997 SHA-256: 407c0f2615b72d671c6cbadd2b5c731e605e8b5c36785e35dc67834e9606c6f4
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains embedded JavaScript, which is often used to download and execute further malicious content. Several heuristics indicate that the PDF is part of a link farm hosted on compromised websites, likely intended to trick users into downloading a malicious payload. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with a phishing or trojan delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • 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://anaksemut.com/contents//files/26260833089.pdf In PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160789e44d20aa---wuzujam.pdfIn PDF document text
    • http://pneusmarene.it/images/file/34994909712.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d0bf8106963350ab8d56bbcb79038bdf/11009322298.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/zovabadebimamixukiluxib.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75764140528.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/29177516968.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/97598089811.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/81402195443.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/todeduwu.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/25106248593.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/bakenaletimugad.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3f861d4c9---meduwosor.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/053fb8756c2f33c64f71d38cc4f55509/savufejinimivoremitasuwid.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bc96f400d---tolikexewakuzalapuzu.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/14529294914.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/1446209348.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/92209219041.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/22472304535.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/5285561259.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16098e7b8396a9---98217889567.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/53924790898.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66299bd198---tuvikig.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/36714723604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=satisfya+ringtone+download+mp3+320kbps+pagalworldPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 17200 bytes
SHA-256: 4c410d134dccc79357efb73f7f5e623df4154eb1b3f3f8cd8f578da12c72b851
font_01_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEA 11764 bytes
SHA-256: f45c56e0d0bc404cd3a99c5a8cd47b7f2564df9323f6afc3bda4e8fff4fdfa4f

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