Malicious PDF — malware analysis report

Static analysis result for SHA-256 b588522ff8dea058…

MALICIOUS

PDF

81.2 KB Created: 2021-03-05 02:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 74339cd4dd876a649607ee98cd860743 SHA-1: d8e5ebd0c6ddffcd385ca272790409d556190890 SHA-256: b588522ff8dea058fed776b50bd78bbc0fe9f92d69687db78f0b9e6e9ed11253
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or link-farming campaign, indicated by the high number of external links and a specific heuristic firing for PDF_SEO_LINK_FARM. The embedded URL `http://vodoroding.info/wilazamodimuvadokomagififojmwf.pdf` is algorithmically generated and suspicious. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to these external resources, likely to host malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://jottigo.ru/strik?utm_term=how+do+i+get+unlimited+hotspot+data PDF link annotation
    • http://flymoney.net/financial_institutions_management_9th_editionj5jqn.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/ibKXrvS/jidijasep.pdfIn PDF document text
    • http://vodoroding.info/wilazamodimuvadokomagififojmwf.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/1tjiggX/project_manager_jobs_remote_working.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/whaO8di/75666564639.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/cfea8719-8597-43d3-94f3-b326fae31d36/how_to_clean_icoffee_opus_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273911e0-86ae-4643-92e8-913ca3a71d2a/72496068873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac7fe82-5d14-4919-8875-fd6f1fd843e3/82154204828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9810d616-9422-4b8c-b226-5c70c80db75c/vedic_astrology_reading_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74766f96-a50f-4244-a3a6-8329f22681c7/12026932894.pdfIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_9de1501e0ef346cf9909ed66e60cf807.pdf?index=trueIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_f0fc0a8df4bb42f78167bbef223fc613.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c7b2f38-30cf-4d38-8a77-adef269f2b5c/oracle_sql_string_concatenation_in_where_clause.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9c0853-2fd8-4c73-8aeb-87582ab9a7e2/can_you_cook_t_bone_steak_on_a_george_foreman_grill.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_b10fc5e5995c47369b4f0f414126c8ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50ba4db-56f5-47d6-8af4-b9d3d7295000/razagugokepixesolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0aefae2-3cec-49c3-81b7-74ab9d827d2e/roligiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f88d14d0-6047-455e-ab3f-a56af477a3b2/what_are_the_primary_objectives_of_auditing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbfd50a-aa9f-4d07-801f-5650991b325a/how_to_do_mole_fraction_problems_in_chemistry.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_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 5328 bytes
SHA-256: 904bbaead3fb9fc675d3184a42be5dee8a2761d113a43dc92a127fd5346754e7
font_01_sfnt_off00011197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11197 11172 bytes
SHA-256: 0e3f05fe30f0ec40305609fd6c5a9839f592dbdf510065925095d1674ac1e7ec