Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e4699f8a6ce83b…

MALICIOUS

PDF

109.7 KB Created: 2021-06-24 09:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 594eea02107a823c7c4be9cc7edc0f89 SHA-1: b08d86d71d58d4b889f89f79ad0d263284d88a1d SHA-256: c8e4699f8a6ce83be94f37628547a7ed2c4c5fca45dcdcf01162e40fb7cbc7de
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb83e0ae31---rofirewegigoj.pdf In PDF document text
    • http://heritagecarletonplace.com/clients/c/c2/c23aa4fb54f25340752d20cfcff880b2/File/46712544256.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/85522952959.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9446b92d5---36046681024.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/156a79011d7a9f1dee588d7c4272516f/77000302649.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/kekepeboxivubasuril.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/tatasegilufalogeg.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/zujuketo.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/54808349343.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814a07407a1---34765258764.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a60b941d2---fidukulokixi.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/85519687461.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/jakelogukupigi.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/52916998335.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/58318538660aa742359b04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=kiralik+ask+episode+39+english+subtitlesPDF 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://scripts.sil.org/OFLIn 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_off00015293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15293 5716 bytes
SHA-256: f125a77466c6f9e5eeb7c274270388a99068fb191dc42390954742e4d901ace2
font_01_sfnt_off000165f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165F1 12028 bytes
SHA-256: 791dfa16448d24b63183ab58aed3bd4b6affe59d44ee6b332307675cf3c735a4
font_02_sfnt_off00018eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EEA 17112 bytes
SHA-256: 436829979245b7126098886beec731c3e32f79caaa22165f5cf5bd484c81a714

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