Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d764fa4e59d8574…

MALICIOUS

PDF

79.9 KB Created: 2021-03-15 09:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5870a0b460864e3b9e3f17a344e5b4b3 SHA-1: d3af1c9de6af9ab4ac3b1a3abeb1194831309db2 SHA-256: 2d764fa4e59d85740cdf4d6c85c100c76ad1843e00fd0bf3f130049f1d199f15
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, contains text related to a search query, suggesting a phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/wix?keyword=where+did+the+towers+go+reddit
    • http://naturaitalia.space/errorless_biology_for_neet_download4l3rf.pdf
    • https://cdn-cms.f-static.net/uploads/4393503/normal_6034c69527c14.pdf
    • https://cdn-cms.f-static.net/uploads/4453332/normal_6032884479fa2.pdf
    • http://fatiberekizibu.iblogger.org/peviregixetumedore.pdf
    • http://best-ital.fun/derogepujupilubowudoturoplz27w.pdf
    • http://tebaxedo.22web.org/20414434093.pdf
    • https://cdn-cms.f-static.net/uploads/4450635/normal_6044fb7573319.pdf
    • http://esplus.pro/kayla_itsines_abs_workoutip3m4.pdf
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fd65d7bafdbd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e85cd87f-0258-4c03-82a9-a89567eff623/dyson_airmuscle_animal.pdf
    • https://s3.amazonaws.com/lowuwofuxali/58063398778.pdf
    • https://uploads.strikinglycdn.com/files/7b66669c-f8e3-4e89-a64f-c5001a3e4f9a/what_is_covid_19_paragraph.pdf
    • https://uploads.strikinglycdn.com/files/00d92a77-b4ea-406a-ae3c-ee7a948657ac/40338044108.pdf
    • https://s3.amazonaws.com/dinigugaxej/the_hobbit_book_summary_shmoop.pdf
    • http://vonorubonazalok.epizy.com/soft_law_in_international_law-making.pdf
    • http://vesunebujel.rf.gd/ccna_sample_test_questions.pdf
    • http://sezajebufixi.epizy.com/24085106066.pdf
    • https://s3.amazonaws.com/muvojugejoxip/jspdf_autotable_sample.pdf
    • https://uploads.strikinglycdn.com/files/b2583b26-c804-4d25-8766-e0df29b92500/9898150061.pdf
    • https://uploads.strikinglycdn.com/files/fc20b0e8-f28a-41e2-9dd6-dc6e0df97966/35701640188.pdf
    • https://s3.amazonaws.com/jezekemunidup/sipimavakaxejasaweworuju.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f941.bin
78f0703cafb762b882cbae5035baff3bbc0beaf0bfa65a073fe1a93765f5d4d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 4952 bytes
font_01_sfnt_off00010a2b.bin
b592721b3011a35f42f2106db2c173a3e418a2cf0081be6608da8818bcf65362
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2B 11240 bytes