Malicious PDF — malware analysis report

Static analysis result for SHA-256 6976f8fd0ebad903…

MALICIOUS

PDF

84.9 KB Created: 2021-09-04 16:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a744efeff7353c0e5375489ada2e48f2 SHA-1: d44551d03fc6252ca669d16fea867fb8fafd3cdf SHA-256: 6976f8fd0ebad9035765353e262a43908b41fafa74cc8e57aa972f86d3bb83aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs and link farm heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://eko-uklid.com/files/file/51667152841.pdf In PDF document text
    • https://rajatotogroup1.com/contents//files/6094349999.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/mumaxovatelepat.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/779a4847595891366c6cca82240cab21/36804130779.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210818/file/3247099179.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/loriro.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/goxurowopodotimam.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210703_041433.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab85a391d---zexozaxofatezidada.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/batowageguved.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/oirp4pg480ni9tv7soojj2l9lm/36555570258.pdfIn PDF document text
    • http://samtekelektrik.com/files/viwasikusekip.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114b2ff6f562---nukegep.pdfIn PDF document text
    • http://moneymaker-gold.de/files/36177118260.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/91819015132.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e0458037f---betowavanuxevexa.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/torixupeponibokoni.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/be8aa541462342d55c82534191c148cb/79552121043.pdfIn PDF document text
    • http://goref.ru/files/file/65287630468.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/28294664530.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d3b8ef40---bopaporigilevo.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/adae345c742e2f080f817d992e8cf966/53782650281.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/35987763882.pdfIn PDF document text
    • http://bakoca.hu/files/file/jonupajepozasafofu.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210728162135_xa20ld.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cricket+tournament+invitation+letter+pdfPDF 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_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 10900 bytes
SHA-256: 102877f5ecc96eb627168f4c355f0d1f8e65b1f3585ca59783e12e96a9a5285c
font_01_sfnt_off0000fbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 19028 bytes
SHA-256: e33d7fe75d4807bd5b5cee6c56e48b611681cd96e54a07e2ce136b0bdb82fb7c
font_02_sfnt_off00012d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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