Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafc90f8c005d413…

MALICIOUS

PDF

76.5 KB Created: 2021-03-05 14:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 839aae5cc6a35c2ac1d94808927b717a SHA-1: 54873aebe806299d3deeffb91cd6dc900c47e26f SHA-256: eafc90f8c005d4138ead3edcb5a71b8609c0baa3db96172d3764af1d310724cf
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'bologen.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to words starting with 'c'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or malware distribution 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://bologen.ru/wix?keyword=positive+word+starts+with+letter+c
    • http://rekopeza.22web.org/21931421420.pdf
    • http://fullcreditreport.info/jenigubetuzalezogyxc0.pdf
    • http://soul-felt.com/65080329330olmp8.pdf
    • http://yoga-italy.space/picsart_for_macbook_airjo61h.pdf
    • http://prod-fruit.space/casio_ez-label_printer_kl-120_manualmdf24.pdf
    • http://gepavozo.mygamesonline.org/bajusekasugodokeseroduzi.pdf
    • http://bnl-jobs.com/voicethread_uf_loginyh848.pdf
    • http://fakaripeti.xyz/gurps_basic_set_characters_fourth_ed3paw8.pdf
    • http://pakawuwujawo.getenjoyment.net/overeaters_anonymous_eating_plan_grey_sheet.pdf
    • http://haifaiv.ru/ludugurabefafomajutalatoxv9jyu.pdf
    • http://selizixid.iblogger.org/59612977810.pdf
    • http://podarokinsta.site/jacoco_merge_reports_mavenpgs48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sofibimibojas.myartsonline.com/vuralomilufo.pdf
    • http://wugujub.onlinewebshop.net/moultrie_mcg-13034_manual.pdf
    • https://s3.amazonaws.com/dobesogum/rapodez.pdf
    • https://s3.amazonaws.com/rerinago/muxibamatukapivimopewazov.pdf
    • https://s3.amazonaws.com/rimejiguvif/can_you_use_all_purpose_flour_in_bread_maker.pdf
    • https://uploads.strikinglycdn.com/files/a7e0d2b9-2c5a-4a87-b8c6-feb4c31a2b40/66693100581.pdf
    • https://uploads.strikinglycdn.com/files/0e70f329-4f8e-47ee-adae-a261804049f9/97025048798.pdf
    • https://s3.amazonaws.com/kasuwevovog/zetobukisik.pdf
    • https://s3.amazonaws.com/topipovikapari/asme_codes_standards_free.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_off0000ef67.bin
61491841722a72b38ac5c7c306731c1af4a5c9b21b586e418a06b67a8c36987f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 5180 bytes
font_01_sfnt_off00010116.bin
5875da0bfeecbf5b0c040ee17290dffcdeb89effa0a5956b38909f0d5d4d9f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 10436 bytes