Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74b247c39fba5cb…

MALICIOUS

PDF

73.2 KB Created: 2021-03-16 06:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a735d60ad117253fa69f464df07610a SHA-1: 4440a7b0fb3ee27716091b6fbb282addd3b100de SHA-256: a74b247c39fba5cb25e057a37dc5af535f69010ff2d7f50c902b4accdec1706b
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that mimics a search result for a technical document, likely as a lure. ClamAV and ML classifiers strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The presence of embedded URLs suggests the document is designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=heat+and+mass+transfer+5th+edition+solutions+pdf
    • http://pumorux.medianewsonline.com/5e_critical_hit_smite.pdf
    • http://sportplays.ru/tascam_dp_004_vs_dp_0067c69a.pdf
    • https://cdn.sqhk.co/duzefodaf/akdggja/13368249979.pdf
    • http://zajawezexefijuk.22web.org/28098521559.pdf
    • http://vopukisavenif.medianewsonline.com/file_convert_to_word_online.pdf
    • http://jitokinut.iblogger.org/41675339895.pdf
    • https://cdn.sqhk.co/mojubemuwek/jAhg6jj/30066384404.pdf
    • http://boevoenlp.com/polk_audio_hts_12_subwoofer_review8w5kf.pdf
    • http://mizejodaf.mywebcommunity.org/reruwadesiragodemexogapop.pdf
    • http://mifukuvij.iblogger.org/sloan_flushmate_503_series_manual.pdf
    • http://fusobilel.iblogger.org/45469038976.pdf
    • http://kernig.pro/98503428751sdvdu.pdf
    • http://xejopegig.mypressonline.com/washington_gas_customer_service_number_dc.pdf
    • https://cdn.sqhk.co/bogovureg/iesjcNl/fuxumiwewumowagebokizi.pdf
    • https://cdn.sqhk.co/korulifesewa/it4lDhm/dessert_recipes_wheat_free.pdf
    • http://nezatarofarix.getenjoyment.net/fatuzakekosojarevupi.pdf
    • http://rte-ita.fun/zarufunofexvufl.pdf
    • https://cdn.sqhk.co/desogepupema/geWKMgh/kaxukuwodewat.pdf
    • http://hookup753.fun/pete_the_cat_thanksgiving_activities563pm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loxopudizus/40834011121.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/84018470843.pdf
    • http://gidigeja.rf.gd/john_deere_hpx_gator_cab.pdf
    • https://s3.amazonaws.com/gekixadonuru/kigujaxituriferuvefukun.pdf
    • https://s3.amazonaws.com/setikizo/segaratakuteju.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_off0000dfa8.bin
dadb3f335b84ac14d6e8d83a11c746a3abb5c39b6a8ab253e5642f9d75bf381e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 5368 bytes
font_01_sfnt_off0000f1be.bin
a93b2ba833eed4080dbb9002346e901496bade19ccb214c4fe207a6eb04ee0e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 10940 bytes