Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea44d5d0961cdde…

MALICIOUS

PDF

73.5 KB Created: 2021-08-22 12:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 65a4cd4d0093df98dbb9bdf22851446d SHA-1: 12fb1e43bac0b0f347a7c313f4aa116b7d9c4a63 SHA-256: dea44d5d0961cddeec066b8f4364e72f47d038322d47db806036f1edefd8e2a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malware or engaging in phishing activities. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate effort to obscure the final destination and leverage potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://garglob.ru/uplcv?utm_term=hallelujah+hosanna+kabaka+by+judith+babirye+chords PDF link annotation
    • http://kentcliffordreunion.com/clients/a/aa/aa84b18e55fac3ff3c25336c5005d9e5/File/35753083136.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/2bpljkh00akrfue9b8nvtf9p95/58395953398.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/mn8fi2ek1220jl5p5kv0mc8ok3/dusoje.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/eb053ed7bdd9dfd44f618c6ab2f31cba/32742930975.pdfIn PDF document text
    • https://atlantidegattico.it/file/5890398375.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/duperipe.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45d78c829---21957200931.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/90880191153.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/53966230912.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/69167133445.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/fuxumujomi.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/maforazeb.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/9d91c3caa960589a9685cba8a659f614/10364679877.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/ruxurinozike.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f331ef2f5---66767573317.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/38142700245.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/gitajoripobatugaxide.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/3317912037.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/84447629106.pdfIn PDF document text
    • http://bronia.org/userfiles/file/sisozebapa.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/samiwosufediroreme.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/govobagixado.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/47e56ec7818380f1f09c37b7f5156384/felevixew.pdfIn PDF document text
    • https://binhvi.com/upload/files/41475618523.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
    • 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_off0000bbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF2 11036 bytes
SHA-256: 4bcc3e3baae76d3a9dd66fb4c5a983248173d244c2e638190649b63f64da323a
font_01_sfnt_off0000d583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD583 16136 bytes
SHA-256: a337cdc5d37d55d09040ce7ab8ae33e486f7e066076b08a0096ff8f4a5902949
font_02_sfnt_off0000ff5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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