Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aded07fd728fbe9…

MALICIOUS

PDF

92.8 KB Created: 2021-07-02 05:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33dcad841ef1270afa2daa227db6d70e SHA-1: 30d4e4565e2102d6c0a86bc81af04a8039da0772 SHA-256: 2aded07fd728fbe9c04fc247c625c2d03160a8eabd29d8de0a7846b4e516a4db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure strongly suggest it's used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://celebicatering.com/upload/ckfinder/files/fazifunetenub.pdf
    • http://aire-limpio.com/img/editor/file/degowo.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087f16e1aac3---64003539144.pdf
    • https://autoprofi.ua/userfiles/file/69273023420.pdf
    • http://cesishotel.com/res/wysiwyg/file/56767810152.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/8e9d72e42912a77709c740ce1b353087/debaza.pdf
    • https://zweefvlieg.net/userfiles/file/pegefowevogowujijipojibu.pdf
    • http://nowator-zpu.pl/userfiles/file/57367565058.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/a7d413a2af45e16eea15ae38108ed3ca/69288873796.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d27cc274---7394748399.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2f9a1d1bc---49152966950.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979da523f28---58441255153.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16206488510493.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab00d38fbe3---vagelenejikofub.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606dce2931568---93987294995.pdf
    • http://hanasushimenifee.com/uploads/files/3166615742.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/d2jb0p9ned13oc7eu3h5ehjru7/navuzog.pdf
    • http://aceonlinementors.com/userfiles/file/dupakodeliwet.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fncqcj8ct8abickqm6a3sgt9j4/numafivi.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/tosuxudunoworupurazej.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c91308bbc---30101219448.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/b7148c07d72d0be56bc385f33ef79030/98535887132.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12e1920aa---rixubukopo.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5df6702a678549c702898a20c61c5818/53818058018.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/0b85fedd19b2f0994d26c435b5e5493a/26734273709.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/9iuubc0e2td15vktejemnaqu64/4764680048.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=current+play+music+and+earn+cash
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c4.bin
186a9f7a681f1cd7dace15d2994e73960bc2e772935178642c9d0254ee8dd40d
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 10904 bytes
font_01_sfnt_off000120d5.bin
1f7974141c09394ad16ef5fbfec45c9255c62d8f59ae56cf4c08dd238b257d19
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D5 17360 bytes
font_02_sfnt_off00014de4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE4 16792 bytes