Malicious PDF — malware analysis report

Static analysis result for SHA-256 addb6a7a8448e9d3…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 21:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f512e6919745cea1e04f37ee7d31845 SHA-1: e41f71659d252e857398c8358c8ccab4bbcd1658 SHA-256: addb6a7a8448e9d3e18b6fdc0c545d3ddaa4c5ce5f23e29048e1bd6abec78238
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and embedded URLs, with one prominent URL pointing to a potential phishing site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely a phishing lure for job applications. No scripts were extracted, but the presence of external URLs is indicative of a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=caribbean+airlines+job+application+form
    • http://sejerodetupumil.medianewsonline.com/81870103561.pdf
    • https://pukunave.weebly.com/uploads/1/3/5/9/135957849/kikibaxilefu-tixax-rokagibijipok.pdf
    • http://rabemedexisubis.mygamesonline.org/chemical_engineering_definition.pdf
    • https://cdn-cms.f-static.net/uploads/4375351/normal_6036b98ebaf41.pdf
    • https://static.s123-cdn-static.com/uploads/4413016/normal_5fcb6957d9fec.pdf
    • http://duzixofiwisegi.mygamesonline.org/tuberculosis_abdominal_en_pediatria.pdf
    • http://sotatetivula.iblogger.org/tugazimefifuxe.pdf
    • http://xufaroruguvotel.iblogger.org/49259473900.pdf
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/6874560.pdf
    • https://cdn-cms.f-static.net/uploads/4479916/normal_5fdc358918c54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kotodur/android_activity_label.pdf
    • http://vunibem.epizy.com/30905636355.pdf
    • https://s3.amazonaws.com/sajatesawodiji/80779108445.pdf
    • https://s3.amazonaws.com/fikuvine/garmin_forerunner_310xt_watch_strap.pdf
    • https://s3.amazonaws.com/kakekojezutok/wiato_ycia_barbara_ann_brennan.pdf
    • https://s3.amazonaws.com/pibajuwi/beckett_simonon_sizing_guide.pdf
    • https://s3.amazonaws.com/kovilowab/injustice_gods_among_us_save_game_android.pdf
    • https://s3.amazonaws.com/palevijuj/sufojup.pdf
    • http://wewapozolebupo.epizy.com/ballyclare_high_school_formal_2019.pdf
    • http://pikubub.onlinewebshop.net/what_is_the_difference_between_narrative_and_descriptive_writing.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_off0000ecd8.bin
08dae8f65df76fbc5a8ec1096f7d046a2d567b86f89b0f15cfa2ad2a430cc883
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 3452 bytes
font_01_sfnt_off0000f937.bin
cd3b33b823626972cd10ec187c5ec0fa127e0e4972509f58532dd3f1beb9beea
pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 5280 bytes
font_02_sfnt_off00010b17.bin
000362877cabad4ef2b57473f6b96d17622766a4416e14d69ff94246cacf5502
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B17 11080 bytes