Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeef3babb900b8e1…

MALICIOUS

PDF

86.0 KB Created: 2021-07-02 07:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 027376cc251e4311e059df9f21fcbf99 SHA-1: 2428301925848771eb14f9caab05d83bdd666e94 SHA-256: aeef3babb900b8e1e8d06c937c47a564c736965a81838964a55c3b7fb857667d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, as indicated by the PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://gabortech.com/admin/file/xibonixavofer.pdf In PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/rarakasunefop.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/fa347b2888e4501146ae8b4bcc17ebe9/lanurujobokulunez.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/32508310572.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609edd8ba0102---94547082254.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b0c8bd31bd5cc822a6b8a2eeac3ed6b7/zabuv.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/49479137054.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620534599.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705a4a6e8f6---35127474562.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/42466157485.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3r6rahhoi9mkb3jvr76tv2dk26/16979745349.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/64004638252.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/vugizewis.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/gometurajis.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678e43a262---87703436877.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/firivoweri.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/texejisawaviseb.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a4df6849c---54199934381.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9eee6cc381---zenipifa.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bdac82a9ccb---92558507886.pdfIn PDF document text
    • http://dgn89reunion.com/clients/862287/File/muxilamad.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/59324102725.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c985ee89c5---darekedimavonu.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/45494569954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mr+tambourine+man+the+byrdsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 2844 bytes
SHA-256: 951082eddaf19d0f5eebfac8365f7e0cbeaf7b7c572f6bcc06ded177097c8098
font_02_sfnt_off000104e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 16456 bytes
SHA-256: 346ee992fbb432b5ca03b5bc9430f9d3c04eb8350d2bb0919a2277d4325ee16f
font_03_sfnt_off00012fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDB 10812 bytes
SHA-256: ec156f5c3a40a3faeb9a3c66da492f95b3fb0fa4e7094f2d872bb679e07addcb

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