Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81b4d8a703de44c…

MALICIOUS

PDF

72.1 KB Created: 2021-04-01 12:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fb61b95667a592d7bfdf5ca15de2d8c9 SHA-1: 537512b79c065904c7b981e80a9041f531b61a6a SHA-256: e81b4d8a703de44c548e11fdf89590a3129d44ab7e810d5bb62824eccc044f4e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site. The document body, though heavily obfuscated, contains text related to 'discovering fiction 1 pdf' and authoring information, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=discovering+fiction+1+pdf PDF link annotation
    • http://xisurutunalorer.iblogger.org/didoxekubi.pdfIn PDF document text
    • http://ratubave.22web.org/far_off_crossword_answer.pdfIn PDF document text
    • http://begotilujaxijis.iblogger.org/10533068679.pdfIn PDF document text
    • http://nobirejajatit.iblogger.org/android_10_support_samsung_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/hie1iiW/fasorapog.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/40hgje8/3123549589.pdfIn PDF document text
    • http://zaxunux.iblogger.org/gedawaduvoremelowufawod.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/xapota/thinkorswim_web_vs_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/68441427417.pdfIn PDF document text
    • http://dutugege.epizy.com/85613556180.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/71736986657.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/bee_movie_full_script.pdfIn PDF document text
    • http://zawagebojirowe.rf.gd/27308618537.pdfIn PDF document text
    • http://pirozaja.epizy.com/dongri_to_dubai_marathi_book_download.pdfIn PDF document text
    • http://vejidot.epizy.com/58072309202.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/771986751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5415caf1-8798-48f4-a340-adb7999e4ffd/supertraining_mel_c_siff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343344fb-71ff-4a8f-8c4d-c14498957816/97800965945.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/28828947438.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/54222743484.pdfIn PDF document text
    • http://fefirujo.rf.gd/can_t_hurt_me_david_goggins_download_free.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_off0000da2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 5192 bytes
SHA-256: e08b3ff6266561487a7abd45f74ba1f812680a36fc22fa1895a3522ab6e2ced0
font_01_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 11252 bytes
SHA-256: 0bb54273f8ee29c147883197d135ac1173becbacdf76d368e7e230a2c5c7a2f9

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