Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4ab7d4e522ab8e…

MALICIOUS

PDF

72.2 KB Created: 2021-07-19 10:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b01e4db3ae09d122465a26504db97bd0 SHA-1: fcbbea3f1dee10c347a71ffd1c8ebcd28026322a SHA-256: 2b4ab7d4e522ab8e9692dfd339a11c2ad52e1828782a4ae30fad59d33f5d8d7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a strong intent to redirect the user 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://girc.ncue.edu.tw/ckfinder/ckfiles/files/rasazitufibatuvenaludifav.pdf In PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f20929fe2---5863656129.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/337b0973a453537e12d5ded802aa589d/lazatoxogim.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073726f6622e---relodulagure.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/36823887653.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/8496f8ee86ab5fb060aba80f7bb19d5e/56901376966.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/9432853669.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db78e14a892---tojekajizuwawupipabejiv.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/kalabumaxuwoverarafak.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/woganuga.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888de7044ae---gagofoka.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/08231ddae3b2f1423baa53810a660d09/87495135735.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/16892058826.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/4eee3aa89d1225bbbb849cb4df5a9534/47289983589.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/zogapofupusesebazoxom.pdfIn PDF document text
    • https://mollis.rs//files/75505834534.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/74268697145.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992ee8b323c---95268927787.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/befipozudidemoxanete.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1a5d10df0---dizasejejurorajewo.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/24136276531.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/62551718738.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/94621535372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=your+soul+is+a+river+pdf+freePDF 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_off0000b8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 10436 bytes
SHA-256: 45afae11390cd4144dbb931a43a53c06cc6a41e5e3ce248d4a21d1fdef6aef95
font_02_sfnt_off0000e8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A8 16444 bytes
SHA-256: 6bf6576e34af74a82e770981081fed8aecee3d7f34a9aed87c8568f0d4bbcbc7

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