Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4b23ecf5822217…

MALICIOUS

PDF

75.4 KB Created: 2021-05-07 04:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fd10ab7e9732fddb2bac081338479c1c SHA-1: 264f83f331689040f5f7e474d57227432414757a SHA-256: 2e4b23ecf58222178515c5c6da2223ee7dc4c94b0fe460f6444131be0274bf72
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and contains what appears to be metadata rather than user-facing content, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/36ff213cd40854f36d11b048a48df9ee/60831667173.pdf In PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607203cd16628---repurukajuref.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160755d8fd3783---33368652169.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081583c96d35---disuwoximixosabuweside.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/88299532788.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-5/20210505130855224508.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160946a6934a8c---39174063109.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701eb9a00a3---jujonegag.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86d39ba2e---76218106010.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/455b64f4e8831bde41862a82f0202b4f/sutiseralemaxafunakikeg.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874e0146d99---duzorurod.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/ff2a31c4dddd1abfe12b89abac55bfb6/potuguvo.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/529c8ccee58fff447a8254d20a9a4b25/57812513139.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089156fbeba1---gorepiwi.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608028d13d36f---balaremijira.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f820049d7---fakizivad.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085a76fcc3c5---72089790735.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78c5f172f---gususibi.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/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=street+fighter+3+apk+freePDF 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDC 5284 bytes
SHA-256: 6d064d53cf3893065985248db7eebd84e1940e4a2936dcf255447140ff7fd568
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 21696 bytes
SHA-256: 760c0024b5751f95142988a3884dc8ea244e341b523c31849c7726720ca9c64d

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