Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ca2c88d477d5f2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-13 23:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2e64adbe1db98c21c554943cb9d5d282 SHA-1: bf1f848856b2b524fab71a662f92613e2874108c SHA-256: e6ca2c88d477d5f275da3f4b0473cbe75ce7f8741c799302695241067ec31d86
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The embedded URL 'https://soxebez.ru/wix?keyword=spreadsheet+rocket+league' is a primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=spreadsheet+rocket+league PDF link annotation
    • http://stopnutristrike.ru/95281000290t53in.pdfIn PDF document text
    • http://konsalting.info/xumelorikazawipoditixaum4ig.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/wow_rogue_lockpicking_guide_vanilla.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/lezalelagolifakarej.pdfIn PDF document text
    • http://mowezeriridik.22web.org/47191077570.pdfIn PDF document text
    • http://dvigatel.guru/schaums_outline_of_french_grammar_seventh_edition6nxfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5a8c2a-acb9-4823-9dea-cb74271dcf7e/31211623279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f39185d-ba74-4a9e-83c5-acd354801ab5/niboregezofalofudejitova.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_e6c3958c5897408a94d0c758bcaa94be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94494bdc-af44-4f4f-9043-a16bac3ad102/30698273330.pdfIn PDF document text
    • http://dominomufu.rf.gd/aetna_reimbursement_form_vision.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7f53b5-f09e-4c62-88f2-8d6d99432489/how_much_is_lg_dual_inverter_air_conditioner.pdfIn PDF document text
    • http://suziwifu.rf.gd/java_compiler_javac._exe.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_f88b4cd41f3144b5838cd3d09acadc8c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3e1d57-a895-4f5e-aae5-0459e4876207/how_to_get_my_subnet_mask.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6033aea-d13f-455a-88ee-27fda0d718c9/mofefigukivoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33e303a-4057-4f53-a0de-957b577eda03/74138607918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c7a7a1d-498b-431f-a13f-a5e16c038efe/475885576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84314e1a-5be4-4d15-ad35-0b6c97d4ec97/48708296378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebc73f5-b90a-437d-90a2-9589b3280509/the_handbook_of_fixed_income_securities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ddc0d0-0038-424d-b84a-d3148e0b2b28/81421028329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37214db-4a1e-435d-ad7a-5d59ca8e4c24/97973787867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82166ea-3aaa-4a5e-88be-952bfc1c7122/honda_eu2000i_inverter_generator_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4f90f1-68a1-4f9e-aadc-2bea95897992/16518823901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb0a4c6-6ead-4355-8f73-29c0be0448dd/81996449217.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FF 5504 bytes
SHA-256: acf2fa616623986f768287e7c7e4f1d6cfb6d2c968ea89d04a15a404a6a552c1
font_01_sfnt_off0000e7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 13824 bytes
SHA-256: 1d59060ad21005c8da47fc2e6ccc414404219135b00d26ddea1b3bcfcb57500b