Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eac89bbca34f2a…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 07:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 28b2b90006c8f15fadda913b65d714bd SHA-1: 8519032cfd0151d468f6e613cfafd4fe8d81a7d6 SHA-256: 51eac89bbca34f2a339fbf14cd7b4582d7f27e1d041b10ad7973b8a1a2bd6e40
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful sites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. While no scripts were directly extracted, the presence of numerous external URLs points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://lozipotod.ru/123?utm_term=certified+beer+server+study+guide PDF link annotation
    • http://opensoda.pro/difficult_word_search_appg9siu.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/algebra_and_trigonometry_with_analytic_geometry_13th_edition_answers2svyc.pdfIn PDF document text
    • http://netekigupi.22web.org/libawerix.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/hhYheU6/jaxagulobuwozudowixajox.pdfIn PDF document text
    • http://creditchecktotal.info/auto_body_repair_booksngpyb.pdfIn PDF document text
    • http://reform-st.ru/7176126142jay5z.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/ghgPcif/88757887562.pdfIn PDF document text
    • http://pro-komp-master.website/duginodi4z5q0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/96643803111.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/10250863118.pdfIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_7b068200662d4e6490b267607d7c619c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/voretuwuvuwepofedajibiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/arithmetic_operations_on_imaginary_numbers_worksheet.pdfIn PDF document text
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_a4defa2307bb425ca12a429e196e3112.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/8120875960.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_e990c5f99d75475483e757aa074b71f6.pdf?index=trueIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_298731984eb04034bbaf11125d263d3b.pdf?index=trueIn PDF document text
    • http://duwudipifajekod.rf.gd/juluzanepivagosal.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/how_to_reset_kidde_co_detector.pdfIn PDF document text
    • http://ralivapoked.epizy.com/87350294278.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_cec042a4bf984c77859d802f7ac1535d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/punctuation_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/7785569893.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_off0000dd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD00 5040 bytes
SHA-256: 5f241241c671aff72bd38af53bb6b5d08c086ae1d9101b69b91b7b0c7f8df2ce
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 11992 bytes
SHA-256: a9b42efeec50b56fd92fb511317ecd396e4d3ed4079bea21ece33b15cb15f8f2
font_02_sfnt_off000116b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B7 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

Open this report in the interactive analyzer, or submit your own file for analysis.