Malicious PDF — malware analysis report

Static analysis result for SHA-256 511465ed6babf201…

MALICIOUS

PDF

86.6 KB Created: 2021-05-25 15:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bdb0379b1efaa448fae003e02dc5c1c SHA-1: 3541badf2686e0ed41c37e94b57437e0c9cbf5cc SHA-256: 511465ed6babf2019ae0fec248d5389fe06472452246952b25e56b24af2b35a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a phishing lure, specifically attempting to trick users into downloading cracked software. The numerous links to compromised WordPress upload directories further support this, as they likely host the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607acb3964d78---lizovediwumurif.pdf
    • http://vasvaripalmuzeum.hu/upload/file/57874024466.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/17t9nspv0vacug8qnubrk84pkc/17659618041.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4b580d3bb9a016cbcea30aa9fc927351/90150662958.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a490b49a181---43994601353.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9fa42f46d---fosuniwokegogiso.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f07080152---28844733443.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75296141a4---fovumivetedap.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4ba541a7a3736c81d86432c396ddfdb6/61320977163.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/f36f244d6535c24037b3f53f6b1296c6/zipefimeritivisalazu.pdf
    • https://soechi.net/userfiles/file/notuzefa.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d34be20fe4---kokeboxiwozudulufaf.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/sivu90hb3clbcb47gjuetu123u/26581013662.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d37e58eb2---63854343560.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/s32p5s6bmlf137d1p6lgkdolli/sajimarikubetezafije.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/3e320fa2ed9a63a17202cf6fbbd72031/rupexetabodemari.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/880634ada99ac7c82b58d1a7d28bf6af/37411311845.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=adobe+illustrator+cc+2017+crack+amtlib.dll+file
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10e.bin
96c06faaaa84f93bfbf66814810e0493cb0e2cab1f211e74ebb3f8d2b32c1ee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 6164 bytes
font_01_sfnt_off0000f64c.bin
da3fce0f05e26b185f8062f1fbf5440da4114f2dc2ef02e2eb336e7484deb8d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 5796 bytes
font_02_sfnt_off00010a05.bin
a3f2b9490005629485bd4267e919f0845e1b8c32cd98b05ac119a81c4e490013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A05 13488 bytes
font_03_sfnt_off0001340c.bin
39475c799b5d56399bb34e207be858b8214e3beaa60953acc23ccdd8a6933236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340C 16456 bytes

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