Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e01e3f11719cd0…

MALICIOUS

PDF

97.3 KB Created: 2021-06-28 09:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba4c1a75cfd8540bbb9db82480544167 SHA-1: 327548ec0d04b9991edf48b4960ce213a96fe10f SHA-256: 93e01e3f11719cd0cee88626556f9fc1782bb629052b17841be47c6c3e1bbd7e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://chinalanpa.com/images/upload/File/79218554340.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2d7e6081---bewemosogitirefod.pdf
    • https://kar360.com/resimler/files/11018580714.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae58361bc5---zefapimukese.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b315b98c---zamirasagomexilemenegariw.pdf
    • http://stlnsk.ru/uploads/file/65042550029.pdf
    • http://angelcabrera.com/FCKfiles/file/futekesefomo.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7429ec57---jikipabitex.pdf
    • http://muacuoi.vn/Pictures/files/selot.pdf
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/tumojovamuxojebalavewo.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0b5d16abf---wamajoxajonanumitizo.pdf
    • https://askisan.com/upload/ckfinder/files/93956265987.pdf
    • http://ip-golubev.ru/ckfinder/userfiles/files/14554867160.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098592614e12---60334224153.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/3b2a6eaff7f395e66de66e5aa3708c35/24004069765.pdf
    • https://ksuskalology.com/images/file/pubonufunuwuve.pdf
    • http://anhbanglaw.com/userfiles/file/sugibuboxiladam.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6bf7f28b2f34e33f0ae71ac5b76b6a9b/lavepo.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/86fb0247f30c9fbc7cbb1088f053fd8c/47848422825.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078d34255837---pizabuvarub.pdf
    • https://alshaabcoop.com/userfiles/file/21373144842.pdf
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/sazopezufisubipavava.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad835c2ed8---2523435372.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943561f2ad8---fetozesadoxewabof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=it%27s+not+by+might+nor+by+power+but+by+my+spirit+says+the+lord
    • 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://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_off0000ffbe.bin
363cab84da3ebbaf13944cca6662706f167b3991ffd2a306c9354f8a17826966
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 11264 bytes
font_01_sfnt_off000119af.bin
3a02a34a123561b58760758781767816aee5069684ab1d3cdda27acaa021c438
pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 17368 bytes
font_02_sfnt_off00014767.bin
abbc9af8ca4b98f40cdca4a5880c46d95e111039617578f9b127e4439b1292ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x14767 16100 bytes
font_03_sfnt_off00015cb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CB0 16792 bytes