Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea99a9ee5e886daf…

MALICIOUS

PDF

78.7 KB Created: 2021-03-10 02:34:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bacb79cfacd364c386fcbdd22190afa3 SHA-1: 94e0a3902701af0754c7f29863ce9f071041eceb SHA-256: ea99a9ee5e886dafc40d5b153b7c77ac7969f892edf3ac9a2c590ef0f0007260
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=is+coachmen+a+good+motorhome PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366306/normal_601bce1c37d97.pdfIn PDF document text
    • https://kujibolivobukib.weebly.com/uploads/1/3/1/1/131163991/xuwekid-laxerafod.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/umhbKha/xewelimesojedolumijivi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5fc9217d705d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fc98f2dddb83.pdfIn PDF document text
    • https://cdn.sqhk.co/konarolikomu/igtzOhe/luxury_real_estate_paradise_island_bahamas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_600aa6b3031a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6041c53ca8584.pdfIn PDF document text
    • https://vujalonekodi.weebly.com/uploads/1/3/2/7/132712286/9472226.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/tixexosidojonifi.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/menulixuropova.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/ehaigCU/desiree_s_baby_by_kate_chopin_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/aRjjDvt/dirt_xtreme_mod_apk.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/41e351fb30.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/hcOihjf/71772222256.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexipazo.rf.gd/codycross_answers_group_36_puzzle_2.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/deep_sea_fishing_guides_port_aransas_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/netbeans_ide_bundle_for_php.pdfIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_9c3f7e6eef584870aa4bd9664073b8c2.pdf?index=trueIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_150e282964444dc287f46b5c524045d9.pdf?index=trueIn PDF document text
    • http://majuditatip.rf.gd/2010_lexus_rx_350_hp.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/kevojunewuzemuvivebajer.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_960f783ecf3e4f919d0428ab72888213.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 5260 bytes
SHA-256: 081d6446212ce144ac3bfdcaef676aa6648d8ca559fb38e8596a8d036e4a8345
font_01_sfnt_off00010067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000108f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F5 10648 bytes
SHA-256: 90d334fd74c70857172f3b94b9895067141e0288262fdf526c9b9e52e3f9cc49