Malicious PDF — malware analysis report

Static analysis result for SHA-256 1465ce6ab882ca0d…

MALICIOUS

PDF

72.4 KB Created: 2021-09-03 09:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 427f84d918963942d328283b4d5579a2 SHA-1: 03bad686500310bbccb0d7b9b445c243d9d38e2a SHA-256: 1465ce6ab882ca0d1a926310462de8d98a42fd72007af73db3a80aaed1ab6a32
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while some are marked benign, are part of a larger pattern of redirection to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160707e0a1983d---87741273209.pdf In PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072b4dd75d34---18433673526.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a714ec3fb8d---2535681726.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/flfoq72vgj1io0h95ugaaa6lhr/41424315350.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d02465eb---nigavatajab.pdfIn PDF document text
    • https://ewt.cz/res/file/zafolijanovufagogurizigis.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/sexaviditarusif.pdfIn PDF document text
    • https://pokereshop.cz/data/file/36459253039.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cb1dc0ffb---20219914759.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/91957590110.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/kinalugudal.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160afb3ab4aa31---4843272813.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/jonojafapogip.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/wetafiduvi.pdfIn PDF document text
    • http://www.pantonerestauri.com/ckfinder/userfiles/files/dipuxametivoguzasimetu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/3274a6606d8a366e1116141543913378/23900035859.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/10842710752.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1541e030c---nekuxod.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/90544624709.pdfIn PDF document text
    • http://nigerseedindia.com/uploads/bumuw.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6118ddc22---92493414390.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/i5nvuf1os3up73dfsqg2lifvkd/nuvogevomote.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/gegitekevumefurunutem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=microteaching+pdf+in+gujaratiPDF 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_off0000b912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 10908 bytes
SHA-256: 857b9e557a33544b0fb3f97f2a982fa6b5302056b0329a69dc22d72bfca53137
font_01_sfnt_off0000d209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD209 16384 bytes
SHA-256: 0da0eed622b9a967fd89548c4ab839b52a7fa9f1bdafdf459de64ff52cf01484
font_02_sfnt_off0000fc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1