Malicious PDF — malware analysis report

Static analysis result for SHA-256 120423b048bb0b32…

MALICIOUS

PDF

176.7 KB Created: 2021-07-01 13:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9149994158d832e3658c10dc47b04ee2 SHA-1: 2dc291ee2d79bc757768dac7e3ee92a81bc9cfc5 SHA-256: 120423b048bb0b32e1e0aa7eaf0bc7e81b5fa70246830f23bfb3bb3f7d2a27e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains a link farm pointing to numerous compromised WordPress upload directories, suggesting an effort to obscure the true destination. The heuristic findings indicate the PDF is designed as a link farm on disposable hosting, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9415

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 https://garglob.ru/uplcv?utm_term=mayan+physical+appearance PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd92eb4fd9---47779873641.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/7qgi4gbt3aat0r0btioo2vcq50/dutapesapuwomopuzifidet.pdfIn PDF document text
    • https://maility.pl_adresuserfiles/file/jazipovinodufabez.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e4a221fbb---98638613925.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5b197cbf37ba23b8e321f461cf128dbf/tobidarog.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608264f87f8b5---47978345272.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///sijimibugedif.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad4b321f3e---kabujipamoxinit.pdfIn PDF document text
    • http://jacksonreunion.org/clients/71346/File/29490686261.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1f923daa---46677322323.pdfIn PDF document text
    • http://screen.by/images/file/nufelavosesatefogene.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/0d0fae87d0703873a4e2c0e6b7e0c5dc/13950333056.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6732161a9f---89794847141.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721427acb33---29489529102.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840af2239a8---kexawixowuziludi.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bq421a2tdt1tq6ia8rftnvldq3/32174970892.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/51174495076.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160af9db206628---tafatetemozavalekawazisi.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608230f4f163a---girelubuxojuparuxot.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c81b867c4---70057073842.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/84654087554.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/gojago.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/49432161341.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b2265f53a91c8207e55d441c22b754d2/79649993923.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C1D 21520 bytes
SHA-256: a5d3c1dddc152813e0f9193db2b17da8574757d59f61f456b7ed4276d19c4e28
font_01_sfnt_off00026261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00027a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A72 16068 bytes
SHA-256: 0ca1c6482c514c4264e76f89e64d670dbc4f92285ceb82d7205d9e14c2cca731
font_03_sfnt_off00028f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F76 3420 bytes
SHA-256: b6fa4c71475c6294c938fee0b03112be5b84af7e564c2a13237268b9d3dcd1d5
font_04_sfnt_off00029cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CC5 10360 bytes
SHA-256: 5fe015d634a064eb8d6460875d421861b2db06a960764d791813474f910646c0

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