Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea30865b5ef2523…

MALICIOUS

PDF

72.3 KB Created: 2021-09-07 15:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f58956602bcee3c7b385035109b38085 SHA-1: c5b708bc2738099122876412702418f7f1595d77 SHA-256: eea30865b5ef2523b93149eb92999437d8c5be1b4974b69f0a728420d820e1a2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, designed to redirect users to further malicious content. The presence of embedded URLs and the nature of the heuristic firings suggest an attempt to lure users into downloading additional payloads, likely through a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://irlanc.ru/uplcv?utm_term=all+ragas+in+classical+music+pdf PDF link annotation
    • https://alate.org/admin/fckeditor/editorfile/95834118341.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/70370788609.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5f8927885e1d1e179e4e50aac9b498ef/ruxubelunexa.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/gavasalapimodejo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/de403dabb2e5ee9ef39a591b828cdf28/44632616486.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/86147316040.pdfIn PDF document text
    • http://drironcat.com/images/file/11951633345.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/c3sgh6se2o62nt40l2t2j9inv0/33911751995.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee7fb10c61---64740467163.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/97486439298.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099b7c03a41e---25986240459.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/86580291800.pdfIn PDF document text
    • http://rjt1.org/upload/files/17502052144.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/96283692593.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/porazajelogegitixas.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/denosige.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/ginagexevasegovamo.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e4bd11cd91db6e1ac1ed86ff212cfcf/zararazatilimoz.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bdjjl7q6anhrsonkc8588lcu16/kajexoritejotuk.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/iu9bcqquiltdbe9avv53vc5559/rebegi.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/zuweziwedugiki.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ngotf3jmun62u2b9ug5ibhvm7l/38155445890.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703fa39a44e---48097365083.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_off0000b7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CF 10696 bytes
SHA-256: 70946632dbf6d06fb29b59b1403fec8ca120f01ee91d92595ebcc41c1a8b050a
font_01_sfnt_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 16788 bytes
SHA-256: a168b605a1874b89619e46c3eb819211635bfd539122adbb2e9427f566d975ce
font_02_sfnt_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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