Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14bef1cd05f6917…

MALICIOUS

PDF

84.9 KB Created: 2021-09-09 17:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9e32382b53dc80a7d77f75c9ead13149 SHA-1: 74b9d9de1a4a364ccd1d7151bcd01f067b6d5883 SHA-256: d14bef1cd05f6917dcb86d74a6878aa8e9ba88f943afaeb89ffe9aa5ebbbf257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external links and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=fake+snapchat+app+for+android PDF link annotation
    • http://hflbdq.com/uploads/file/030317058868.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/38926357575.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///zemodo.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/zikotubob.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/e8r4m9kqsvf0ucfn5uj5230f00/fotodalikikojif.pdfIn PDF document text
    • https://lesura.net/userfiles/file/zimokarozadusepexorofeg.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210904031409.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/bupogorevetijudunate.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/43685118368.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/mazoge.pdfIn PDF document text
    • http://livestocktool.com/d/files/pevakipepodil.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/20142288125.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/75796014351.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/jibaxazuboxer.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340f07b89eb---94224106231.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/53639011814.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/1431630260.pdfIn PDF document text
    • https://maviet.vn/upload/files/56360168327.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/zowodaba.pdfIn PDF document text
    • http://klenderbio.com/upload/files/jevifuxenefakemefitok.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/30901086705.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130085e99078---70647459732.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/38366994746.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6aacdcf56---65141093981.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/wegebogopojesef.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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 17584 bytes
SHA-256: 5bcbb5625f0f7e1324d1a513143c8f81ce4ee05461ca71eeeaeaba5152503da8
font_02_sfnt_off00012d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D6C 10740 bytes
SHA-256: 9550f3afc07954467ff1c1b60fab5ea0b7f849bf8974b095a2870dcbb5da781b

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