Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e6ec0b7965f635…

MALICIOUS

PDF

83.7 KB Created: 2021-08-19 12:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: eb93bede3585872b6ba91f9c513385b1 SHA-1: 79f617cc2f87691fd32d78e4b60b1fba3afb61be SHA-256: 09e6ec0b7965f6355351fa44db93040dc60b287782eb9cb42c6877edce6eef48
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/fd21d0a87bf09ec7575df4279f72d371/vifovaxubigikudizerama.pdf In PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa574d6b5f---98932410211.pdfIn PDF document text
    • http://topp.pl/_topp/file/98391276300.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16085827aa1333---18397743939.pdfIn PDF document text
    • http://soles2walk.cz/data/file/99184378403.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/1646127919.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e96c11f647---vajiwedogapikezilovi.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/991b23bc18efd4a2847d9bcac632fc9d/gawopanadewef.pdfIn PDF document text
    • http://aquatherm-graz.at/files/suduwotujadujozunaxopabu.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/58d391fv7vc94kgsq8p527523k/15679247429.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/1291401ec7ed868b40c6ec1cbe7936bf/52396920265.pdfIn PDF document text
    • https://jambumanis.com/contents//files/16905918849.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad615ba03---20348229141.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/lijegewobulekusunowomej.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/8rdctaaeje9okkcptvqrb43au4/jovepevuravovelaxo.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/40608217792.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/wimuguruxosufej.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16110e16e5b3c7---53556473709.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/lovigikeralomesalezemi.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/72247939538.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/pubidedasemabuxi.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/15005224950.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/wofudobevix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=libro+de+matematicas+de+2+grado+de+secundaria+contestado+2019PDF 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_off0000dc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4C 18460 bytes
SHA-256: 64188d93cacff3eb791da393f97c1f3dca9d073fe1c4c0ec3967435efd366d88
font_01_sfnt_off00010b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 11324 bytes
SHA-256: 0ddc0414c85105c94ecd6225b849b118fe2426528f1c1f65e58f690731a06191
font_02_sfnt_off00012587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12587 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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