Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc1410e8dee309b…

MALICIOUS

PDF

87.8 KB Created: 2021-07-01 00:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 165ced58a892f918638552d371eb48e0 SHA-1: 9a4034f0bd33d121f7a4e0a697bb5d1e182abfd2 SHA-256: edc1410e8dee309b668fe88fd3757039e5fe2722e18d2937a9a95105a020fcc4
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and the link farm structure suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.anjhimayath.com/upload/file/jawesapazupixowe.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1fce591291dcfc2c355f823d7fc0ef13/fapiletobojenab.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/2201832898.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16092824430232---87840109355.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607265051629c---58208864867.pdfIn PDF document text
    • https://banghenails.com/upload/file/gibipapubaj.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/m3o7ddgntp5kfeq2r4ehtin8i1/85871077759.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52331e5f95---sakofazi.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/67566870525.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/fvk0eh08soc1tllmvcbabvnfc3/lusimimedovolijitiderixid.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/391da4942c363e3ce88e2ea20279d071/49803170867.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/66d92bb826dc8a399c2f5b78ae53f487/sugivefimafux.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5fcc1538b601a81efb7c98a2ba8d6f41/pedoxezugojifixawapaxo.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/ruwififeduzogubuku.pdfIn PDF document text
    • http://thaide.org/userfiles/file/84975289215.pdfIn PDF document text
    • http://446888.top/userfiles/file/36632801857.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/63c8faf26e7e15917dd4e3cfe1ebc195/vemaba.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/busik.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/tugipodazedamekakituw.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/b33d7afbeea4636bb49d9dcfd42009d7/18123731354.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b37c3a1d5---tezedivo.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/wosolajapigukimepize.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/74719301489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=forsyth+county+property+taxPDF 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_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 10628 bytes
SHA-256: 505f98456eaa98be6a86dff7142fe3c929ed39b7ffe8a2d9ef58342a04a8edd9
font_01_sfnt_off00010e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1F 16712 bytes
SHA-256: 2c7ab2eeeb2c0ae41c19fdaa987ddc98c7e4d7fc7f8de4df9ee307af068031c3
font_02_sfnt_off000139cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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