Malicious PDF — malware analysis report

Static analysis result for SHA-256 da953bb2598d69d7…

MALICIOUS

PDF

80.3 KB Created: 2021-04-01 11:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cc3b09274557524bd385b6cbf5845814 SHA-1: b5e66f298fa7d2452ff9d4d999bdf5aa1d4e2893 SHA-256: da953bb2598d69d706c0af2ac37a2e19cc15b43dee9a33e0bfd1af7a8973028c
186 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing lure, disguised as a 'McDonald's nutritional value pdf'. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=mcdonald%2527+s+nutritional+value+pdf PDF link annotation
    • http://wiinorama.website/38933984666598lq.pdfIn PDF document text
    • http://jumpfs.space/omega_3_fatty_acids5zcjj.pdfIn PDF document text
    • http://watertea.space/simelopazenoke30lkl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_2fca48d77969434d988347d9cbd88b6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ed1f0e-bfe8-4ca2-8d72-dabba97a170b/troy_bilt_econo_horse_parts_diagram.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_5540448c46a54e9c858cba6311c369ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf4cb56-51b2-40cd-a0a9-1bdc8470bd01/julius_caesar_shakespeare.pdfIn PDF document text
    • https://e37fb4d6-fac4-4cb1-96d9-cce2dae532e5.filesusr.com/ugd/ed2751_883b57f6f0e64eaaacae1a2fc3c287d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a6980f-17c9-4679-b4e8-c8348ef66280/30551874415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f860fa2-4124-4142-9c4d-a2333ba790a7/53616613092.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_efd68a06e19542d8b004ffd07f5bd0d3.pdf?index=trueIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_901a63c9fe7e49ccb74502501dc1a375.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55725afb-1375-40bb-8681-58ee1610f6a4/my_directv_remote_blinks_green_5_times.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_73536b9059bc431988e7446551167166.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d78283-1dc1-495b-aeb8-06927d6f8687/how_to_write_copyright_symbol_in_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca9f5ac-3ec5-4eaf-b834-e43249811c7c/how_to_clean_a_griddle_stove_top.pdfIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_914bc9fa810b4f6eada7488a6731b73e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62093799-fe4d-44f3-8a8d-ade4e8b9172f/what_should_i_do_if_my_service_engine_soon_light_comes_on.pdfIn PDF document text
    • https://63a0a607-6d1b-4b95-a813-f1b07cabc719.filesusr.com/ugd/ad56f2_aa15e4feabab43a3bebaec8ab0cfc4a8.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_bfce1d75dd77411095bfc816cd9ff599.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b26d8a-cd76-4d9f-82a2-4f0a67e68925/how_do_i_connect_my_cctv_dvr_to_the_internet.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_0c47d6ef79094b9590866be9f1368a56.pdf?index=trueIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_5159a3f2b1464e7984863a7e9c8fe9a7.pdf?index=trueIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_922f8dd9ac37481d971016865eea0a85.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_a86ad73219284f9391ff9ca84c955fc3.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5B 5248 bytes
SHA-256: 7ff254107ee4f273f376ed7098c37c6cb708760de019bd2a219852b5a2398843
font_01_sfnt_off00010c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5F 11756 bytes
SHA-256: 0963749819f78ae485c38830f9aa6302408e50bbb0335993aa8028680ea24492