Malicious PDF — malware analysis report

Static analysis result for SHA-256 785d838214057b9d…

MALICIOUS

PDF

70.8 KB Created: 2021-03-27 22:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b1190f55e9918299adf0c69919ddf4b SHA-1: f4f140714396cec3b9baa30b8fcfc001306ece49 SHA-256: 785d838214057b9d2fb32ad8c0bf2d2eff8629243994265bd8600c1884493a88
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by multiple heuristics as malicious, including a payment redirection lure and a high ML score. It contains an embedded URI pointing to 'https://ponafet.ru/123?utm_term=astrill+vpn++android', which is likely part of the phishing campaign. The ClamAV detection name 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://ponafet.ru/123?utm_term=astrill+vpn++android
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/3d6fd07ba8.pdf
    • http://kagaromorin.medianewsonline.com/xulewiru.pdf
    • http://kutatit.getenjoyment.net/norcold_refrigerator_replacement_chart.pdf
    • http://lixorajepidil.mygamesonline.org/we_make_the_road_by_walking_means.pdf
    • https://zugatesek.weebly.com/uploads/1/3/6/0/136082504/6250060.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_60184aea7dda5.pdf
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fc98aaf566d9.pdf
    • https://galevegu.weebly.com/uploads/1/3/4/5/134507196/5f23254807edc7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeropizuwe/96096073289.pdf
    • http://muvekalufisu.atwebpages.com/dopalufene.pdf
    • http://gizixaxeviduf.myartsonline.com/the_bronze_horseman.pdf
    • https://s3.amazonaws.com/zifozujiwi/how_to_clean_a_tecumseh_5hp_carburetor.pdf
    • http://xakagigoneliv.myartsonline.com/lijavuwakesemen.pdf
    • https://s3.amazonaws.com/nezanurugega/26336198601.pdf
    • https://s3.amazonaws.com/jesidofefe/b_r_automation_studio_4._5.pdf
    • https://s3.amazonaws.com/wanasuvedigo/polimerizacion_por_radicales_libres.pdf
    • http://ruronegiseko.atwebpages.com/9_gifts_of_the_holy_spirit_and_their_meanings.pdf
    • https://s3.amazonaws.com/rebomedug/1st_rank_raju_kannada_film.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_off0000d91a.bin
5a7ee10f74d06c8c6b3566705c5013d97ff6626492ac5594c68c4ebc6e70e03b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 5000 bytes
font_01_sfnt_off0000ea2e.bin
f8d9c98342f5259ae1e72068c9694c3bf0f036a4956624e400c9b67f2e6c4c11
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10544 bytes