Malicious PDF — malware analysis report

Static analysis result for SHA-256 f009e8d217d202e5…

MALICIOUS

PDF

90.7 KB Created: 2021-06-14 21:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8b3fa4cdceb317b96b19c7b06aba64e0 SHA-1: 8791b810307bed488920e9ec9c4a4afe3367368b SHA-256: f009e8d217d202e5fe1ad47500d3a4650c89bad87be14880ce2fb52f427331e0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate it is likely designed to redirect users to malicious sites, potentially for malware distribution or credential harvesting.

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://allytemp.ru/uplcv?utm_term=swtor+best+crew+skills+for+jedi+knight PDF link annotation
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/95030965780.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/8e4ef0bc039cb7def673b9cd2d624891/52991059012.pdfIn PDF document text
    • http://sun-eko.eu/files/file/fenavozowaxovazufaliguz.pdfIn PDF document text
    • http://indel.sk/userfiles/file/nobudubinapuwofasobuted.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/b96e08bb170e560e4aeea497041009bb/46992686334.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/f5639aab1a87bad8d0e0853af999e8b9/tikuminuwonu.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/wurukupoma.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/90617782956.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b16e64882---88231516755.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074186cbf138---lajipalopupefudoge.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0cd01c5bb79e974bf4fe3ddbcaf9d65f/37358202369.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/1c93773f5ee46fad14d45ade67c460a4/podiravetufipufidefe.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b7e439d1af9---2019338937.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/betep.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
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11660 5336 bytes
SHA-256: a6358d3ea8eb38ebce44cde6774eb3db97a2849d69b7efcf3136616c6d4f374c
font_01_sfnt_off00012887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12887 11088 bytes
SHA-256: 8d8fbf49ea9a1d5c8d6e1a15df4484086f93bd1731b06507a5a3a60a51ed86f1
font_02_sfnt_off00014e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E53 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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