Malicious PDF — malware analysis report

Static analysis result for SHA-256 a306e10620d66833…

MALICIOUS

PDF

83.3 KB Created: 2021-04-07 02:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e00baee79241aa074c2eee9284c583 SHA-1: 41f9903dc0bf70aaf1448b17bd1a5b5a80adf459 SHA-256: a306e10620d66833ec9679435dff07440842f008d9efc8ce5f22b43dc5d68168
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an external URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of the external URI indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=bibele+ya+sepedi+pdf
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/leriwuzis.pdf
    • http://cheeronthemove.store/cs_3630_gatech_githubklazb.pdf
    • https://cdn.sqhk.co/tavevalurov/jbp1jdv/zotipopep.pdf
    • http://befipekawuzader.iblogger.org/13_merit_badges_for_eagle.pdf
    • https://cdn.sqhk.co/xopuwomu/fTGuhap/75500924241.pdf
    • http://gnoogle.site/13173261943lk29i.pdf
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/4054104.pdf
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/93994b32f86d746.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_5adc5b2d9b50457b8e3aadfc085a8dda.pdf?index=true
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_f2a6ff1d16924fc593f6d5812b546e18.pdf?index=true
    • https://eae964be-cf9f-49a8-9b2f-00020d526acb.filesusr.com/ugd/e932cf_6d6c8b86620346349fd3148cfbb8804b.pdf?index=true
    • https://s3.amazonaws.com/defujo/what_does_hermeneutics_mean_in_the_bible.pdf
    • https://s3.amazonaws.com/temujonuwu/vosojerezesi.pdf
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_f7bc9fac63094b7bbcc116b864ab9dda.pdf?index=true
    • https://s3.amazonaws.com/toguvaju/english_words_translated_to_afrikaans.pdf
    • http://durakukulutozar.epizy.com/43619667571.pdf
    • http://wagivudixar.epizy.com/vitozojikinufa.pdf
    • http://jarakuxajebo.epizy.com/how_to_compose_music_free.pdf
    • https://7d14b3fe-44ab-47f5-a5a4-fb5d7998febd.filesusr.com/ugd/ba499c_7e7c20c8eb274e2f8e0f6c29700541cd.pdf?index=true
    • http://putesedesupelo.epizy.com/12973095854.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_off000107da.bin
9d2f325c8e4d6c38b13fba108bfb6c96a726006f8aa59fd4b6164b982be6181c
pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 5232 bytes
font_01_sfnt_off000119c1.bin
54bc619159f359918b8c45cd717e39e00b22bf4cdbb47b8f2556672b7f7f653f
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C1 11356 bytes