Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8d870e5fa59db8…

MALICIOUS

PDF

85.1 KB Created: 2021-09-02 23:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 44c9cb5dd7ec638571115f0126b37a1c SHA-1: 85d721cf9edde619ca4a4a9c3a7eee074215f41c SHA-256: 9d8d870e5fa59db880eb8b7089a1e033b2b5d9592a960ae168f1d0251c669b6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations or disposable domains. This suggests an attempt to lure users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://erex.hu/upload/file/8784007897.pdf In PDF document text
    • https://onutglen.com/caningest/images/file/zugerijiginisodijaxawiru.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607edd5c894a2---bemokanul.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/xesejezutaxifapof.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/50533340680.pdfIn PDF document text
    • https://cmoretv.com/userfiles/korotejomep.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/2079199526.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06c6c200e4---jobebozirikilorij.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160932fbb22ec8---pokis.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/30505778032.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/jatikutejasisidisaxo.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/togurudemusisek.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/firojut.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/bvdgleorac3r373uka5pac2ahg/memamoru.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091b917965aa---38214657982.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/d8db8ada97dc06f3e672e3782b5af856/nidekusix.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd910c14bc7---pokunironiwusawijeg.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/34983052097.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/58648686329.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608da003cb66c---3245332663.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2298a46476ee5f30144be0911fe01c97/bugadanuloti.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c71ee58e1---rawujozivulowil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=decision+making+skills+in+management+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_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 18460 bytes
SHA-256: 8e3e6cb9d4d167bd5e7629e6cd3b6edcaf0714b2aba6ef7513852556914abe12
font_01_sfnt_off000115bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 10956 bytes
SHA-256: 8ecd34d43e4fda5495f9c189668711c4c85d748235e11afbb12bc9cb50da3bf9

Open this report in the interactive analyzer, or submit your own file for analysis.