Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade2202679d2b008…

MALICIOUS

PDF

82.8 KB Created: 2021-09-04 23:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a3d4c330449b48b96ad1fcdc8ac6724c SHA-1: 756beae60978d5fed3306db282a8dc18172e0f59 SHA-256: ade2202679d2b008e43c9c4a2e11d0b69f4db97d70a5f58bcd6a4d657603ca15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of multiple external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=how+to+manually+factory+reset+iphone+se PDF link annotation
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/1fc9e9b9bc4e72492e555fcd1cc4d17a/82698056194.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac692f8416c---94614844159.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/neruxajedikomadajibux.pdfIn PDF document text
    • https://ienter.bg/files/67955549501.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/8ca325fb6cfed8e0c774e81fa07bd783/jujuwijogakeweramirogog.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-19/20210519002645405820.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/15442022814.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/4852df47e5c9db244358ecc01aeba347/tulexaxifizifetigamiroxov.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2247fc500e53984c4b0873df52c2cdfb/wuwonerix.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae65ca309af---55150717571.pdfIn PDF document text
    • https://isleo.com/i_photos/file/73389626648.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/64487650474.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29727e61f---99820505420.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/7a12cff66d23dfadf1481ad0f001be3d/8367851175.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b21af0529---28556288005.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/a112d6c0b9ff6d6287c225f411f502d4/77801463552.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/44128170529.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0345c85055---12534710682.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/o2bg5tp6c98ijllusa9i3ico65/85414536499.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/98256896933.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/ec880db0990fd330430f74acd4704077/jomede.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/17252321982.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/sudej.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/vumotu.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/71158911086.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_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 11036 bytes
SHA-256: c92e040b7ef6b6aae94ee3add8838c7409988bd52d899155a744c72336668f1d
font_01_sfnt_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 17424 bytes
SHA-256: a4286da43508bd4cd4c7540c3eeb53639f4bb865635c5d378a6ff39c1a3799fb
font_02_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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