Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cbc5636572a0d4…

MALICIOUS

PDF

74.0 KB Created: 2021-04-01 16:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ea8a2ca9f415a64a391243537224578b SHA-1: c8fa9c7c9b6d2faaf520cece74492847e115062f SHA-256: b1cbc5636572a0d41fa52b9f4d6458902a46c21bd22c0e37ba1d7e619cb10928
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational materials, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=addition+and+subtraction+test+grade+4+pdf PDF link annotation
    • https://cdn.sqhk.co/zimuteraf/jNjingi/police_siren_noise_download.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/airlift_performance_air_tank.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoroxur/egiAiar/52130786091.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/1YXidhd/tukezuzuzelif.pdfIn PDF document text
    • http://nuneriwu.22web.org/malware_antivirus_free_for_windows_xp.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/cricket_batting_tips_in_tamil.pdfIn PDF document text
    • http://samafutanub.mypressonline.com/craftsman_10hp_30_riding_mower_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/cSVsTgi/sanibonixot.pdfIn PDF document text
    • http://fadewujetenuve.mywebcommunity.org/bunarujanupaxaduw.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/4iiifmv/clock_face_image_generator.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/kasuwevovog/4715473541.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/madusufejupamujul.pdfIn PDF document text
    • http://xikusaduxofi.atwebpages.com/8566724897.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/attack_on_titan_season_2_recap_for_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/black_and_decker_jigsaw_js660_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/wepalipivel.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/fowatadabek.pdfIn PDF document text
    • http://xiromenabagagi.rf.gd/cashier_cv_format_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/kuwadazagaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/xevevidu.pdfIn PDF document text
    • http://robabunegulawi.rf.gd/1956445572.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/zukaf.pdfIn PDF document text
    • http://xesunuz.epizy.com/kebebe.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_off0000e15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15B 5508 bytes
SHA-256: cef8147e16cb8226cbfd987014d5f1e146dc308c366646224e89dedda23b62a2
font_01_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 11208 bytes
SHA-256: b8da90fbf0c8e6d3fa911a5db3f4ea484760c0219f3fa3df331b36494117375a

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