Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a369ee2db1323a1…

MALICIOUS

PDF

91.1 KB Created: 2021-07-01 18:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e4a23979ef1beadbf86ceb807884eebc SHA-1: 2a1dfd702585754035f95d01ab961cbc71034dc1 SHA-256: 0a369ee2db1323a11b33c0b767d238a1a33f1c00de744bc69f8a5250a8cae645
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or conduct phishing. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for further exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://marcobernini.it/userfiles/files/81275104875.pdf In PDF document text
    • https://rajatotogroup2.com/contents//files/18205815946.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/15147762948.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/sirunafodobumegokefif.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/zutobofamesaregosakudoj.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/6234420570.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/19c4818ef4a60481bb950372c8a84dd9/wakojadebajovunine.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d829e97c5b---67558662373.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/29afdfeec8068b9bceb574c51b2c809b/tisedofezeroronosivopo.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/53094138921.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/557f41968dd3b1b3f87c235876e40d0b/xojomibonapexunugaxilu.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/tujofome.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609200d21fdb1---silidupi.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/28375753451.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6r4ho15fp5f235vdut5s5ubnhj/vibateludaba.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/gisudunemavenoza.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4l4oeh6nj0c3hpai0r324ieaqt/zipenikagexixomatezejilam.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd083c372---39145038254.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/05f9776746259e978ff23dd130f86df9/74264181329.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/d3b31ca823d499153426395e73988d4f/xabatapuzagoxa.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/puxunokirudusewofamo.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e6a74ec7---setotokeziwubomunupusebaw.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/77605117002.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af1b17186---tugezidinorujotagawabuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=name+tag+recipe+in+minecraftPDF 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_off00010081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 10468 bytes
SHA-256: 2bba074502b09532de96952e01df921b2f0e27723b5d31101de22aa99a4ff75f
font_01_sfnt_off0001183e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 17284 bytes
SHA-256: 7292cbefe86edc71e549b7ef123b7a3e683a7dafa4198495680ead760df8d411

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