Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c065787d3777bc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 01:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72b2b7006f89ca9fd69ca20d2fdf7dc0 SHA-1: b34c30061abc4586d19e20d19c805d3beeed4fd6 SHA-256: a2c065787d3777bc8cbab6e7ce5147155536a2e69024cb67dc54f9581ae6a888
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c39818859a9---8934942307.pdf In PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b616010a3---fugeramuxemavajazusunuvin.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/retagodiparokadapi.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/lijowakoxiga.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/xotivit.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/28121503806.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/jitefa.pdfIn PDF document text
    • https://taiyotech.jp/userfiles/file/vuxoribigipavivotafipotan.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610c11863da70---melaxanefezigo.pdfIn PDF document text
    • https://advik.net/userfiles/file/21878496957.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/89350195008.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/xovalewimelajiv.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d180077765---99602314398.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/botufarenakose.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/filisofexofosowolorox.pdfIn PDF document text
    • http://www.moyekolodin.com/files/87122204520.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/nirejaku.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e6d497300---68699301160.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/61521944942.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/faviliwufugenovamagu.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/pipugedujejibetu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8e34b6820---juvagopariginef.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/pinisino.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9uinnjb271ech7hual7sb0f1c6/nugazovivusij.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f80be817c---59559054857.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/2937740143.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pirandello+poetica+pdfPDF 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://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_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 17412 bytes
SHA-256: f1445dcaa00a2629f1bd56dde3339c262164ae121c6f8f0705ca5aa5fde1f855
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001231f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231F 10444 bytes
SHA-256: 566cac73844e4872f41ce5fcc74b9f5818730f82156d281972d1ed09f122df10

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