Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ebaf1baf3d4548…

MALICIOUS

PDF

92.9 KB Created: 2021-03-04 06:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fe0b0d434f4fc9b0705af443c5c4c0ad SHA-1: d062ade7606eccc1f1af527b96a475361249a08b SHA-256: 04ebaf1baf3d45484d98632f968aecb25d33aea7cf2d1d800f8478a473cc2794
96 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. The document body, though heavily obfuscated, appears to contain text related to 'Descriptive fiction writing examples', potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=descriptive+fiction+writing+examples PDF link annotation
    • https://cdn.sqhk.co/bosareke/BgiEgeO/fbi_cyber_security_newsletter.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/bRZy9jf/56379182328.pdfIn PDF document text
    • https://cdn.sqhk.co/zunesunatiri/htO7iiX/e_coli_uti_contagious.pdfIn PDF document text
    • http://complerbnp.com/287711205175huwj.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/fheIiju/faxevunowajawosezikadixi.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/jhggmhh/karozokomos.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/chdQije/no_fear_no_favor_meaning.pdfIn PDF document text
    • http://shtangye.xyz/home_depot_rustoleum_cabinet_transformations_lightv2rpe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kefefetafij/pilafibafavilorikajupabo.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/peforewefiko.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/71459624802.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/hey_brother_hey_sister_english_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/how_to_analyse_the_structure_of_a_nonfiction_text.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/44528564776.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/lubolarafavav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F97 5344 bytes
SHA-256: fa1e4027d0cd106badab7b4205227c099d073009ad84aeeedc24742a6d1c5850
font_01_sfnt_off000131bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BF 11308 bytes
SHA-256: 5d1d7e51e9e4114ed1264e5a3480b5c3e6f9dba98d9abddb83af4244430a642d
font_02_sfnt_off0001581b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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