Malicious PDF — malware analysis report

Static analysis result for SHA-256 96945277a31fed56…

MALICIOUS

PDF

81.9 KB Created: 2021-07-14 09:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1b86ab40dfece0a12b07a19d9c9783a SHA-1: 3ad02eae12f926122e7878a741cb619a8c8f7e0c SHA-256: 96945277a31fed56c4ad2f1d0ebe2ad21392311cb0d2704e55507541bca777f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS upload directories. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://queure.ru/uplcv?utm_term=pacific+electronics+af1000+manual
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081f0395faa7---lejafazasurusodonaxi.pdf
    • https://granchefpremiumfood.it/file/20096160346.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f273904d27---fitogena.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e9ce7357a374f4a410f90efc4bde47ff/badimaxoda.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/5d8e5e322bf6c5e6911133b68847d5e2/20347418218.pdf
    • https://cardion.dk/gfx/fckimages/file/munikilofuri.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a41d67e876---33335150280.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5e18aa0e5c6b15f771f28d536ee4d9e9/33121375760.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4a1d03c93---wigikezazirakobozepafarez.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5ef37994---favokixuxakadek.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/53b2e0edcc0e96743550f12045ce2dfe/23637975426.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2788ea9f9---furijumebowupali.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160776cfa89f52---dubejubupagagexilubusa.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836f64ecd8e---tilovamokiwevijuzokoduxim.pdf
    • http://baobiachau.com/luutru/files/3880883993.pdf
    • http://kursadowicz.pl/Upload/file/vajileleteburixeva.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089394c54d8c---71827495721.pdf
    • http://sushiloverca.com/uploads/files/5482909356.pdf
    • http://dalaichau.com/files/53405182735.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/oflib5bf1pvanfd6vg49qa2245/jukujulibimutajebetuwupi.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a53bbe9af---juvitadubinasivazakav.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fa5596e95---jedepumurejuwazupofatobeb.pdf
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/20580540689.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/7c7b5ed73d7802f1d63f15572ad064ea/pariwonulimojus.pdf
    • 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_off0000db29.bin
b940a98baf04b432d77e471bb48ca4cf0691fd89ae2b4c92d7f463ce20f540c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 17256 bytes
font_01_sfnt_off000107ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 16792 bytes
font_02_sfnt_off00012005.bin
cd3b25ce487875f64b1b42e21747f2ede924caf6c01040add15c99b8c2eefe1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 10772 bytes