Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f43bc34111d454…

MALICIOUS

PDF

74.0 KB Created: 2021-09-02 08:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ab3b7936bc009a64c2a0f9a196cbe705 SHA-1: edd90fc4ea1608ea491a057f86c2912d2ea9a596 SHA-256: b9f43bc34111d45490bc883c7a19ccacd6f0b3a940abf67393d49fde4efd6161
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware delivery mechanism. The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination and evade detection. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://sanchariglobal.com/userfiles/file/96196105486.pdf In PDF document text
    • http://gptools.net/userfiles/file/16344522470.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/97869577545.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/62931733019.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/37708311847.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16111fb6991cc6---93639063024.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/af89e71ab9bb3fa86e9931bc33778a40/7754032250.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/roneteduwugi.pdfIn PDF document text
    • https://etadelloro.it/images/file/kokimamogevokanuzobotuj.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/70602109259.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/54112154891.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/zusujozijizofabamejov.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/pepefimodovomelokevuxi.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/akm39khh0ljbn4ju2bcaneqbf3/womiguwujuzepas.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4404e214da---korusezobokajarugofe.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/5a7cc006195c1f8469cccda9d57b51c2/84880661330.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/qpe375ta2n7h6956cr4d1k6h9u/tidipipavukuwawixe.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b5be3656b---jolepafi.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202107211535388141.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/18700368786.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608754eeaefb0---9508498978.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/zegigejisanulolav.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f130b4fdf4c4816beaf10cfc50b1eaa5/23241158361.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e286e57dbb3---fevizegatizinexe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58a510eb1---fabikoxovexaferugip.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bli094phd8dmj1ukden9fh04s9/gisorijas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=bloated+stomach+constipationPDF 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_off0000be03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 10732 bytes
SHA-256: 7edbb65721ffaedab7b98e7021137de5f1f371e9bea6cb0c33b6f14e53fba065
font_02_sfnt_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 16936 bytes
SHA-256: eb8e84b905b7d4e58d315b0e94ea26f22507ffbe6c7bea7432a6a0d34e865683

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