Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0c6965a3c99f6c…

MALICIOUS

PDF

79.0 KB Created: 2021-03-12 04:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09bf530907cf2f49a97a6c1dfa4b27f0 SHA-1: 95e0983e060a37b14b2486030ca35ed0b60236f0 SHA-256: 5d0c6965a3c99f6c3d6b60d4fe3f3270d1e72e808cc2e29de712737c897febe7
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=spotify+mod+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410695/normal_6021003b277f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_602cfc573aa97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388272/normal_60090f8350266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_6023cf7a2b2a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_6041c8ac8ffd0.pdfIn PDF document text
    • http://topfrag.rip/que_es_un_editor_de_presentacionespa00w.pdfIn PDF document text
    • http://pubgucbayim.com/nujovowinixoso5ybvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_603953d89d483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_5ff66ca9ae13d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414691/normal_5fc62a80bac94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446646/normal_600bd44a55206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462678/normal_5fdc7935bb96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_600d36f44caf0.pdfIn PDF document text
    • http://draiwenstore.online/7356770918nwfle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugubukegi.epizy.com/free_chrome_for_android_2._3._6.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_8a90139e5db34b30b5a35eee8bfe93fb.pdf?index=trueIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_c40bd0fcfd324c569fffd09056088926.pdf?index=trueIn PDF document text
    • https://b760d8db-9746-4821-aa2b-94c9f806d328.filesusr.com/ugd/26ce45_ca45ebfe787f4ebca18152c7405b880d.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_e5981c378d994346a3b49ed3b26e96c8.pdf?index=trueIn PDF document text
    • http://vimevuda.rf.gd/3d_anatomy_atlas_apk.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_8db2b603c0c74ec0a1941003594eefae.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_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 5248 bytes
SHA-256: 7659cb6bdc58d224524c52d6a680e89151bba12d8d891f4f33a6414a76b2f801
font_01_sfnt_off00010152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off000109e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 10700 bytes
SHA-256: f00406fe0ac6873a4bf9a9338055839be0de3fec76cfa9beaa44eb85e897ad11