Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c49ccff44dbe06…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 04:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 96ad1a2c1f600542ac9a39618e469fb8 SHA-1: 6fd39dae7c6727bd40baa1d000d82a67786f9214 SHA-256: d5c49ccff44dbe069831eaa4b236d8d5a4e488a8c105ee196f21330b6b4f47e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious websites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous URLs and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://inwebjor.ru/uplcv?utm_term=prova+policia+legislativa+pdf PDF link annotation
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/fogajusotamul.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/8001644885.pdfIn PDF document text
    • http://bvsaigonbinhduong.vn/uploads/files/gikijitesifubovoxipiwufux.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/josev.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/22aa5c65417ba4f337f45c3c713851eb/mugafinidezofi.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/84755204293.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/91118227095.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/sinipux.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/5985191472.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/48314446660.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/71660522787.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c755a3188---19461669910.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/90887289873.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/41324043882.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/zenilizimotozukow.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/fibufenujej.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/butinisazodeliwo.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/24451651251.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/kupanoxogim.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/54ced48e031db54bdff1b2b2be704023/22051781400.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa4224c010---xugonifofazize.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/54ac1a116005127062a05c7f0a819f65/vopomesomoxop.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/45052047808.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/39838340582.pdfIn PDF document text
    • 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_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 18368 bytes
SHA-256: 4dffaf637511c843db3fe4c81ad98d5d414876a279987a8711018c1dc8032ab3
font_01_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBB 10756 bytes
SHA-256: 898963255d15662fadb602a7d7754dee6a26211fca26626a1b16c94ab0028b4d

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