Malicious PDF — malware analysis report

Static analysis result for SHA-256 478e84523c12abcc…

MALICIOUS

PDF

135.3 KB Created: 2020-11-30 01:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c9e182f55a0919390685ef51cb4c030a SHA-1: 2a2d9a1031ca82ebe350e0212e759ce2c4d9d96a SHA-256: 478e84523c12abcc045f2cef394faf8901a9049c797a9e77a4a295669682a018
214 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9816

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=colorless+tsukuru+tazaki+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5fc41f11755f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_5fb49315c3fc5.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/nakipigakazus-xufozafi-gafigotuk-fuxojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f8a4df42ee46.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/xasiravenejomajaxaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f8b8563ba7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_5f99e3e6d6881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f224436a-9baa-41b9-98d3-314563887967/gasizuz.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/gunuzasisidasoniromikez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b418ed70-3843-471a-902f-8ec700f0857d/nefevatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e3bd1b-83f9-4b70-8159-86340378d0ce/rodolfo_de_la_torre.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/lapawusezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517adca9-1b3c-487e-bde0-ab87fc13fcf0/witcher_3_where_to_buy_dye.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/zubafiserusejuraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b041cd51-f87b-483e-bd04-4d6572070f11/67635897539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b932c0f-162c-49c8-b44e-d47493d054c9/bowulomevuvake.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001603f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1603F 13744 bytes
SHA-256: dd47bb497e6d2fa52055f0c6a6e9754499e89930e52bae622f13145c26ea3f4d
font_01_sfnt_off00018c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C86 4948 bytes
SHA-256: 1547c2463ae5fc1a90b69339e4ae953b22f561dcdfe7d153928f3953e5471b06
font_02_sfnt_off00019d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D79 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off0001a8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8DC 13544 bytes
SHA-256: 8f6199c9cbe633cc26c625032eafda5f97d3fe46c24dce346c00fc50a7778df2
font_04_sfnt_off0001d5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5AC 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_05_sfnt_off0001eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EADA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_06_sfnt_off0001f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8DA 6024 bytes
SHA-256: d57862ab810479f8339a7fbde4a05a425e6601804d9f78939c9faa15aba5513f