Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb059e59263d741…

MALICIOUS

PDF

74.0 KB Created: 2021-09-08 07:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 309364bf4b95e8a51a589d6818bd2f02 SHA-1: 139e2a892ea6ee6b937c0e20d1a2dc81e0f7b87e SHA-256: cdb059e59263d74188fb499c2f1bd6fe6add8d28e7ae94a091679e3fae99154f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs hosted on compromised CMS uploads and disposable domains, suggesting an attempt to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or SEO-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://chcial.ru/uplcv?utm_term=holt+mcdougal+larson+algebra+1+pdf PDF link annotation
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/dc9b21f19dfd137b643afecb5533ebf7/meliwuk.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/4v5eveetctceneba1mlc82u53t/41722764089.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/65819513227.pdfIn PDF document text
    • http://www.jokilaaksonratsastajat.fi/file/nopudamaguwasapigate.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119beb1bf920---fomitizotubewot.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120c26b42a5c---11015893897.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800b5be4e4f---benisedufoxudo.pdfIn PDF document text
    • http://195exim.com/datas/files/50847753647.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607badb21ed7d---52584346241.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/laxizupezoguf.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e2c82f0ea78cbdc66e8a534ed0ec35b2/4651472171.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/tncgm8agroecjqvjmtk6drev33/nipufafegezitimoravike.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/89280947961.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/80e464c7f616b65022dfe6b8e0a88aff/zugafo.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/24322620928.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/71097072059.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/70850183786.pdfIn PDF document text
    • http://absigorta.come/file/63942782704.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903a19bd40f---dujafomimaburobovigefadep.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/18e20e8a967af45709ed5a984350b207/44858536069.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/46030870430.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/3fdf7ef8c00bb3c3438ffd220c86b1de/ropotejoxifogaxuguvixonax.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9814dd3cede8ca1242b3db665cd75399/sebuxewemipebuzuv.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_off0000bf2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 11156 bytes
SHA-256: 1c60e4a3a99a0c6bd1c05df574b7c9cc948fb585fd4b1e0ce592566523d95691
font_02_sfnt_off0000f0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 16232 bytes
SHA-256: 05e031c9b30024941da8fb6e35ae273d3ce7406bceba16788de3542913704fc9

Open this report in the interactive analyzer, or submit your own file for analysis.