Malicious PDF — malware analysis report

Static analysis result for SHA-256 9060ad402838d02b…

MALICIOUS

PDF

82.9 KB Created: 2021-08-30 16:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9da2b2b65659279f8635a85749100b43 SHA-1: 6c9d9289a97d6e5d167e2c52fa798a1083ae8a29 SHA-256: 9060ad402838d02b8f192c845684058844601cadf8d2c509cf25e5acfa51e7d1
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 an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution scheme. The file's structure and URL patterns suggest it is intended to redirect users to malicious sites.

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 https://krisoc.ru/uplcv?utm_term=example+of+synthesis+equation PDF link annotation
    • http://ersatzmonitor.de/userfiles/file/kipusoteluzunomajik.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de1ae85f323---63697309315.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/20175557606.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/41562708655.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/wavojusisefodaxijaj.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160751bf19d84f---zamoxet.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/65043688219.pdfIn PDF document text
    • http://195exim.com/datas/files/bujamagimuvesuje.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/fede340bd67f112542417e16c3d5e5a3/69363851496.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a839112668e---51361745771.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/d1e2a9b2f972b9053fd74c2bc2ab526c/jidupujow.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/0f76291c49d703c762382159624f2f4a/57408507596.pdfIn PDF document text
    • https://mcdpiti.com/userfiles/files/19839465138.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607586501202b---taresomirazajosegon.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/botejifosugu.pdfIn PDF document text
    • http://www.moyekolodin.com/files/nufotevepebugirilisipape.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/kininibopitixedokekiwutoz.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/89135174414.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1626097121.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/28535046138.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/dadebfe4039b204274190403d618774f/27836317149.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/280351063324.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/daecbd6e11f4c10a59fd35f123c6cfdf/danobevared.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/suzerumeladojexagimozilon.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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 18500 bytes
SHA-256: 5a002aa1a331a5e9279de261152e9ed07142ba1dac409858ff38a42e4cb7a634
font_01_sfnt_off00010bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 10968 bytes
SHA-256: c402bbdc08a6edee9b3dec3b69118d5592006200ea9e4100f92c0ad27974b1c0

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