Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ede0b5423877a7…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 23:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1373ad884c72963b1c1a1ad0cbb7f0cd SHA-1: 7384593c19c045c6fab704d65302edc540b5098b SHA-256: 94ede0b5423877a70f40d4693ac1810a6d7a00833921819f0c9ce1fb27dc3ff8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded content are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://internet-trade.eu/UserFiles/file/murol.pdf In PDF document text
    • http://sonsuadogo.org/Images_upload/files/wupetarudam.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/13607764833.pdfIn PDF document text
    • https://motecx.com/images/file/41537976519.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/93065063931.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/04ee86d2e0b9b7e7bfda2ae474bfc50a/wesojusije.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16133f9c3e2fbf---11366878955.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/91855595481.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/fikuzurisixuxeno.pdfIn PDF document text
    • http://polletnv.be/uploads/files/60801319469.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/fifiburuz.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/54527550350.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210914123535_socghl.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/suwudamubigusogogi.pdfIn PDF document text
    • http://agmapure.com/upload/files/godiredazofopemilolizod.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/20090850189.pdfIn PDF document text
    • http://strechybenesov.cz/content/6300526639.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ojd93oves51kn46gg0c4m91k07/zezosoxoxoxologaxiv.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/16299124937.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/zorixa.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/gujerasojusaka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=judas+and+the+black+messiah+putlockerPDF 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_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 11104 bytes
SHA-256: 59fa5ccbbc1d7053f6b239b1a6c6f16010d629cee5339068f4e848af136742af
font_01_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 18244 bytes
SHA-256: a504b9fe2ac86053685cf2468130ff0f3baa2ab0ae3225523febec0aa5a13014
font_02_sfnt_off000128bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1