Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab96569af927b1c1…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 17:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f27cae141802ea13b1f214d79981d2dd SHA-1: 15286c67f93a6b06cf7abe50ce7eff32045952a5 SHA-256: ab96569af927b1c1069b553217288adce16be17dec03fa98ad1536b7bdbc041b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/77ee5bf9427a3b8182e792149b84c281/jisotusiworuxigowoloderi.pdf In PDF document text
    • http://dralituncer.com/userfiles/file/gisisob.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/xotebuwutomobupiloginifeb.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612acdb45fae0---90487553938.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/weforumusutopebi.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160949e47cc9e0---11817729768.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/92861461848.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/93396646020.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb356e78d---40684604381.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/80910188781.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/morufogalukubavu.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c23c39304a8---dimarasipusujopixe.pdfIn PDF document text
    • https://uudanbury.life/files/file/53701270772.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1999c16d0---72985542725.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160836e594f18e---13664462671.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/27201370028.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/kojurizolagadibazekadab.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/76473890075.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/37581655902.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/4881425821.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/70015020349.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495839ec8b---44007052174.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/up8vlkkl13h9bhj51slf1bpqq7/manimalosujozoselovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=chicco+london+stroller+instruction+manualPDF 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_off0000c008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC008 10764 bytes
SHA-256: ce80d0d835cb8648ff41fa7e4ab70f92696852774fee4d0ecb15f47e1ae6954f
font_01_sfnt_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 19196 bytes
SHA-256: a56f60ef7e9f55efda76098b997371b3ee47988986c2a9f8c44125defaa4e522
font_02_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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