Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be40d9bacc0bd59…

MALICIOUS

PDF

75.3 KB Created: 2021-03-18 00:32:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628be4b69553b85a58d9d966a02b06c7 SHA-1: 22bb1a8a9a88823d0c82f097563f0396615b7629 SHA-256: 3be40d9bacc0bd5984b15af96d6ec1eb32b62e807be767f06976f6a5162c2182
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, indicating a high likelihood of malicious intent. The embedded URL, https://midufefew.ru/wix?keyword=bear+grylls+pants, suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a malicious document designed to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=bear+grylls+pants
    • http://salizurewaki.mypressonline.com/2020_nascar_xfinity_tv_schedule.pdf
    • https://cdn.sqhk.co/raxuzuvuluf/M8WQgib/stupid_zombies_apk_app_download.pdf
    • https://cdn.sqhk.co/juxajomuz/ghhzIif/1809193161.pdf
    • http://raxanoxev.22web.org/lexus_rx_350_price_in_nigeria_2010.pdf
    • https://nateguwab.weebly.com/uploads/1/3/1/4/131453796/a6af03d.pdf
    • http://soxisit.22web.org/vapegusejofupavabonizigo.pdf
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5ff0dc3e3ec99.pdf
    • https://cdn-cms.f-static.net/uploads/4490528/normal_60238f0aba41b.pdf
    • http://zopokujejisolan.getenjoyment.net/saga_oscuros_lauren_kate.pdf
    • http://salizurewaki.mypressonline.com/funom.pdf
    • https://cdn-cms.f-static.net/uploads/4448750/normal_5fd924472d1ea.pdf
    • https://raputaluwim.weebly.com/uploads/1/3/1/6/131606275/xiresetavuro.pdf
    • https://cdn-cms.f-static.net/uploads/4502920/normal_60262ec16a75c.pdf
    • http://mumolazesinidix.getenjoyment.net/periodic_table_worksheet_answers_define_a_family.pdf
    • http://jukejed.mypressonline.com/atkinson_index.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dikaroko.rf.gd/cateye_strada_digital_double_wireless_with_cadence.pdf
    • http://kaloruligot.onlinewebshop.net/tiduwodivezib.pdf
    • http://xisuwujilaxemer.myartsonline.com/40768949252.pdf
    • http://wiraxoxepopiret.rf.gd/floccinaucinihilipilification_in_a_sentence_yahoo_answers.pdf
    • http://pelebirepopo.onlinewebshop.net/dewalt_thickness_planer_dw733_parts.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_off0000e9df.bin
85dfee543a3594e5e369ab5c9dabe977b57e5a543a57645b3d1befefa0660e45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 5136 bytes
font_01_sfnt_off0000fb75.bin
1767be9f0c160ffb34d1b575fd4513b38cdf468212b3526cf883ef8facad10f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 10740 bytes