Malicious PDF — malware analysis report

Static analysis result for SHA-256 55308a3f362ea135…

MALICIOUS

PDF

79.3 KB Created: 2021-09-14 21:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 293d3860c8dc09ac1069bfe3b456da18 SHA-1: 704e2dc4125ab0cedb23de12444aa0eec872483b SHA-256: 55308a3f362ea13568cbbb3b19ea63cd8df62ffc4762f614f4e30840f04a3d4a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security scanning. The presence of embedded URLs and the overall structure strongly suggest a phishing attack aiming to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://philabc.ru/uplcv?utm_term=android+wifi+password+sharing PDF link annotation
    • https://ispartaorganizasyon.com/ckfinder/upload/files/46432739504.pdfIn PDF document text
    • http://konberdbio.com/upload/files/gikasad.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69725075094.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/5586031886.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/nonifojobejowetazemuro.pdfIn PDF document text
    • https://eslms.com/userfiles/file/fegosirumedefixapoparod.pdfIn PDF document text
    • http://solo-reisen.com/media/images/file/76167843627.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/bekadunusuninegoradaf.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/10200777987.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/jevezufaxuka.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/53655477633.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/tijufikefakigotorevoxeja.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///zubipusatovobudezajudob.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/lafixaguxagojitos.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/xosetipegad.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/muvipix.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/etokevogevu.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d961eebffb---zotojeregarimijedom.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/morigilaxolorisubifegidol.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/mafewewewetowew.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/99879125279.pdfIn PDF document text
    • http://gibisch.info/files/files/dukazuta.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d4f275126---lasifanatafabowobowogi.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/tefogaritup.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_off0000d30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30E 17476 bytes
SHA-256: 9671247b60e7eb60b6082929af050909c6191161072f26985832da8260e4fd7d
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 10568 bytes
SHA-256: ef98d51e2c30161c5610e1cc70bc5c48760bc335a5547932f9450c972d701e8f

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