Malicious PDF — malware analysis report

Static analysis result for SHA-256 18094f3e2fa589cf…

MALICIOUS

PDF

84.7 KB Created: 2021-04-07 13:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 27c2f003fb83d8dc8ccfcfe778506706 SHA-1: 15635f3b54af5e0310636febb31dac2617423f34 SHA-256: 18094f3e2fa589cfe653673f32afc417c11a2c2483b21a7bac1be5e5d70a9c49
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic to redirect users to malicious content. The embedded URLs likely serve as the initial lure or landing pages for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/aws?utm_term=how+to+clean+ninja+professional+900+watts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466140/normal_601711770a9af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488810/normal_604a3b7f1991a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ff5142a6ba15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ff82830796b5.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/337968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481828/normal_5ff3b9a3682ca.pdfIn PDF document text
    • https://zitakusosexozi.weebly.com/uploads/1/3/4/5/134595565/vulukijorukegi_livudiluz_xurunusopomulaf.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/f92cf8a2-8871-49a3-aa81-e81928979e6b/61568547196.pdfIn PDF document text
    • http://newiroxupamorik.rf.gd/wow_classic_mining_guide_leveling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d5730b-f6b6-403c-a632-a1aae69e862f/kuwovemafutosot.pdfIn PDF document text
    • http://doxikejopem.rf.gd/xovajigavik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87afccb3-71ba-4db2-b41f-cc0178030c1b/when_did_we_enter_ww2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84db0124-e4af-4e1e-8904-4d48444a71f3/sig_sauer_p229_9mm_recoil_spring.pdfIn PDF document text
    • http://demiwadipojaz.epizy.com/short_story_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b71c56-7753-4a36-9a11-8ebc9833157a/tepomekagizefefeduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d05374-9fe9-49b7-a121-aa6cffb2da1b/list_of_modal_auxiliary_verbs_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374fb9c3-9bef-4a7c-81e6-3dada70a7af3/transformar_20.6_pulgadas_en_centimetros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd9503f-62f4-400b-8120-db93f93899dc/taxibugeguzanire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ad6307-5ab5-45c7-9d65-443474252f17/smash_ballot_results.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 5436 bytes
SHA-256: c863893208596c9faaf0421f98c02ba9f2f03e2936c65f64bba83149e4574757
font_01_sfnt_off00010947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 10932 bytes
SHA-256: 3d14407999be69c70b62a55e0aaad0a09ac6a86c691b84d88ce7842705ae7c65
font_02_sfnt_off00012ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE8 16092 bytes
SHA-256: c14de85559d4b33d76026f6d9e3db52c4ed5e8525d58960fe0ba0e0ca9c0a166