Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed2eb987dba561b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 23:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e0b600cbf468cd249411bd09d087015 SHA-1: c74ccd8b0c14463717e0e7437b27f47100084e81 SHA-256: 1ed2eb987dba561be74a8758a2bd8797655a532b58b1b82b58f5cdea1fd29cd9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous embedded URLs that point to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be SEO manipulation or redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://moje-stranky.eu/userfiles/file/tadekureninuja.pdf In PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/radipujinemazo.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/zatawadanubujav.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/xujenixijegab.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/mirukedemepojafukunanewum.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/bigotepusonanazivoxa.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/sogixalijipew.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/8e7588c2214e91324e96692905eb4e06/xowigipo.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/76183688110.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/68688784352.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/53036935399.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc0c55f42---betofizoromazu.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160997f4fed9f3---numovobikuvesem.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5b350baef---mikijer.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/zujekosotovijuloxusuxu.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/35436352742.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/21072217544334748467u99ax0d3gr.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/93988337643.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/e71ptto3vlgc9m9rck2npuaka0/xuwetajidawuzos.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaba0085ad---nudapa.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d5c9a94750f421d019a9a75648dd7df2/51418573956.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/femusabi.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/aa58c906d4ad01aa49efd2e584fad087/57212150295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=word+hd+answers+7+lettersPDF 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_off0000d1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 10380 bytes
SHA-256: 3448f8ef3776b07b43aaa5ea11b2974d2ad8a1404d4567fd6d3abf4a96a0eae0
font_01_sfnt_off0000e942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 15100 bytes
SHA-256: 308a81d1934ce9ef5547393e95ac2c3698360bd4ed6361856b05c0773a87730a

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