Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b859e83a8d9e8b…

MALICIOUS

PDF

127.3 KB Created: 2021-06-17 14:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2d7661bc57efdeaeedc5e079b39ea8b8 SHA-1: d0d094b246057088d30387640a544e2f641bdd60 SHA-256: e6b859e83a8d9e8bebd9f70cb0280ce7103a6e2befc06dff8fccf4b3f237e9ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/41de3d3e891dfe1abad1859ffe50d2e6/47002365708.pdf In PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/u9q68e2l32fu39odcp85ajffoq/futobaketarix.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9836e51eec---95388396657.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/kinebovozap.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea4202eec1---bedetigo.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/dda5a998a4c89b239dc58d92cb08efb9/kowawegaxupevu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608755ab18c07---refoxunutubani.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/13692901637.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/55461494824.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/b76l4tvh0shqb9dtqsf3g839mg/takufojevapazeke.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/ac39b2b000edbf1ff88a7eda1883a8c0/tawigowobudonuvinodinuz.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/2ed8300d0404994ad3a8575f7c8e93dc/46538569482.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/notudofalevuwubab.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/44572073837.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/164ffafacc4dce2e02f1d6119d6d5064/85909404054.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=amharic+children%2527s+books+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ce0cc5f57abf53c7d4997b3b37e1973f/pejufutekibokarel.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10263 66208 bytes
SHA-256: 0dbd5747a42c0552a69426aaf88a93671620bae8780f303939792d3c5e0ed2f3
font_01_sfnt_off0001aa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA28 5332 bytes
SHA-256: f8d8cb1da946d45d90563f9fd1319485381beb3c71e45f83172506dab1079170
font_02_sfnt_off0001bc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC08 10632 bytes
SHA-256: 412d502627f13480ade8fc82ed10d9be8473071cbc09d602ef983a29d89cb734
font_03_sfnt_off0001e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E02A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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