Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4c1987f6e036ff…

MALICIOUS

PDF

80.7 KB Created: 2021-03-13 15:38:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0019dbe1be9c1c2e1e1617d2dedf3d48 SHA-1: bd980807967bee10c569fa1a8fc91c5d242d8221 SHA-256: ec4c1987f6e036ffdfc801812745eef0e7dae9dfc1ac2e39b4a531d1eaa15909
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 embedded URL that appears to be part of a phishing lure, directing users to a site related to 'dna fingerprinting word search answers'. The PDF structure and embedded content suggest it's designed to trick users into visiting the malicious URL, likely to download further malware or steal credentials. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or credential harvesting attempt.

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://jacksth.ru/wix?keyword=dna+fingerprinting+word+search+answers
    • https://cdn.sqhk.co/vasibejovej/9Aw4Xgi/onedrive_sign_in_error_0x8004de25.pdf
    • http://fezibinuzot.iblogger.org/remavokajuwefefu.pdf
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5fce157f73142.pdf
    • https://cdn.sqhk.co/sorubajuzoxe/ijPih7J/clash_of_clans_update_2020_september.pdf
    • https://static.s123-cdn-static.com/uploads/4366034/normal_6008b7e3bfefa.pdf
    • https://cdn.sqhk.co/ramojezi/ajghjjj/simcity_buildit_layout_level_20.pdf
    • https://cdn-cms.f-static.net/uploads/4421061/normal_5fd71011637dd.pdf
    • https://cdn-cms.f-static.net/uploads/4389097/normal_604690430babc.pdf
    • https://cdn-cms.f-static.net/uploads/4424991/normal_5fd63c36bb15b.pdf
    • http://rimka.xyz/620221600421rmk6.pdf
    • http://pafewubeb.iblogger.org/convert_static_html_to_wordpress_template.pdf
    • http://dutebolidetol.iblogger.org/67843982703.pdf
    • https://cdn.sqhk.co/xugumewaz/VX2hgJL/15464981813.pdf
    • http://wevepizivato.22web.org/baby_video_songs_free_in_tamil.pdf
    • http://varistop.site/pay_it_forward_book_online_free60svv.pdf
    • https://cdn.sqhk.co/sadetujadufi/hgTjhhd/30424955540.pdf
    • http://life50it.pro/norma_iso_31010_espaol_gratis3mvdi.pdf
    • https://cdn.sqhk.co/vemudumuxixu/5GShige/88466580706.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xatonidolib.epizy.com/gokubopovatobo.pdf
    • http://jefebewo.epizy.com/cdac_bilingual_dictionary_free.pdf
    • http://megisaduvivegi.epizy.com/wekujisadikifiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efec.bin
767fb8a0a5b7dcccd55622abca3333e6700b9bfe1feec325999817908291bda0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 5264 bytes
font_01_sfnt_off000101e2.bin
664e233a1a2960b8398a6027cf2f540f6cc14f23181a8446e65ec2a882e67495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 11188 bytes
font_02_sfnt_off00012775.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 4324 bytes

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