Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e30be52f303c175…

MALICIOUS

PDF

70.9 KB Created: 2021-08-30 04:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa7f791bbf48b8dda87cffa144e8214a SHA-1: 8950277780f53fe27915066d6f4a4f327d3ded1e SHA-256: 6e30be52f303c17501e744e74b3b518ce024e3862b27223d59826f8f3cf608d5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites that appear to be compromised CMS uploads, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bagodilovaspark.hu/userfiles/file/kupunaxuzuzebelon.pdf In PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/7rv4m3t42hg7uk9uaegp58f2ve/vanovonono.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/vosukekixerodolileguxo.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a558225968---48104190083.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/3744769758.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/gowagerefedodeg.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608245de2a460---bukigigojaxeduloko.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/o8klbln4rg86g18ce6f93g42gk/femigevakufujino.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/xezuzuromaseragozumor.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f70785b0c---tugaxezedisuj.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/98837197659.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/revorudepuxag.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///68550899324.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beed7c31deb---terizidek.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/60598420507.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/6173146999.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/95aaaf8b585373ea704bde6841cbee95/loxeloxovagutewatizovi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/t1ajifpml023dfbphn6mcm8jmi/46509346062.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/15599510599.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/xagegebej.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fd9544839---porik.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/viwavorek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=high+voltage+switchyardPDF 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_off0000b500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 10804 bytes
SHA-256: af2fe503d11052620e6f0f8bcd18379677950b44824047e8045bd4ec51040638
font_02_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 16460 bytes
SHA-256: 4c257b29ac32e1918e605615380497b32d83dfff06d555be3814f41303552816

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